**Describe the bug**
When connecting via read-only user to clickhouse, unexpected exceptions are logged both by clickhouse-client and clickhouse-server.

**Does it reproduce on recent release?**
[The list of releases](https://github.com/ClickHouse/ClickHouse/blob/master/utils/list-versions/version_date.tsv)
Reproduces on 21.3.3.14-lts

**How to reproduce**
To reproduce this issue, official RPMs may be used. It doesn't reproduce with docker image yandex/clickhouse-{client,server}
* run fedora in docker:
`$ docker run --privileged -ti registry.fedoraproject.org/fedora:rawhide /bin/bash`
* install dependencies, wget and a text editor:
` # dnf install initscripts wget nano`
* download clickhouse 21.3.3.14 rpms and install it:
```
# cd /root
# wget https://github.com/ClickHouse/ClickHouse/releases/download/v21.3.3.14-lts/clickhouse-client-21.3.3.14-2.noarch.rpm
# wget https://github.com/ClickHouse/ClickHouse/releases/download/v21.3.3.14-lts/clickhouse-common-static-21.3.3.14-2.x86_64.rpm
# wget https://github.com/ClickHouse/ClickHouse/releases/download/v21.3.3.14-lts/clickhouse-server-21.3.3.14-2.noarch.rpm
# rpm -i -U -v -h clickhouse-client-21.3.3.14-2.noarch.rpm clickhouse-common-static-21.3.3.14-2.x86_64.rpm clickhouse-server-21.3.3.14-2.noarch.rpm
```
* uncomment `<access_management>1</access_management>` line in file `/etc/clickhouse-server/users.xml`
* start clickhouse server:
`/etc/init.d/clickhouse-server start`
* connect to clickhouse server and create read-only user:
```
# clickhouse-client 
ClickHouse client version 21.3.3.14 (official build).
Connecting to localhost:9000 as user default.
Connected to ClickHouse server version 21.3.3 revision 54447.

e9cae3b6abc2 :) create user readonlyuser identified with plaintext_password by 'password' settings profile 'readonly'

CREATE USER readonlyuser IDENTIFIED WITH plaintext_password BY 'password' SETTINGS PROFILE readonly

Query id: 32e34c2d-0b7d-4bb2-8806-abb5789d8a43

Ok.

0 rows in set. Elapsed: 0.003 sec. 

e9cae3b6abc2 :) Bye.
```
* now connect as read-only user
`clickhouse-client -u readonlyuser --ask-password`

**Expected behavior**
Expected that it works without any errors.

**Error message and/or stacktrace**
Error on client:
```
# clickhouse-client -u readonlyuser --ask-password
ClickHouse client version 21.3.3.14 (official build).
Password for user (readonlyuser): 
Connecting to localhost:9000 as user readonlyuser.
Connected to ClickHouse server version 21.3.3 revision 54447.

e9cae3b6abc2 :) Cannot load data for command line suggestions: Code: 164, e.displayText() = DB::Exception: Received from localhost:9000. DB::Exception: Cannot modify 'system_events_show_zero_values' setting in readonly mode. (version 21.3.3.14 (official build))
```

Error on server (`/var/log/clickhouse-server/clickhouse-server.err.log`):
```
2021.03.26 09:45:58.976489 [ 259 ] {} <Error> TCPHandler: Code: 164, e.displayText() = DB::Exception: Cannot modify 'system_events_show_zero_values' setting in readonly mode, Stack trace:

0. DB::SettingsConstraints::checkImpl(DB::Settings const&, DB::SettingChange&, DB::SettingsConstraints::ReactionOnViolation) const @ 0xe6d2170 in /usr/bin/clickhouse
1. DB::SettingsConstraints::check(DB::Settings const&, DB::SettingsChanges&) const @ 0xe6d2b20 in /usr/bin/clickhouse
2. DB::TCPHandler::receiveQuery() @ 0xf8c916b in /usr/bin/clickhouse
3. DB::TCPHandler::receivePacket() @ 0xf8bfbb7 in /usr/bin/clickhouse
4. DB::TCPHandler::runImpl() @ 0xf8b83b2 in /usr/bin/clickhouse
5. DB::TCPHandler::run() @ 0xf8cad69 in /usr/bin/clickhouse
6. Poco::Net::TCPServerConnection::start() @ 0x11f7d83f in /usr/bin/clickhouse
7. Poco::Net::TCPServerDispatcher::run() @ 0x11f7f251 in /usr/bin/clickhouse
8. Poco::PooledThread::run() @ 0x120b5979 in /usr/bin/clickhouse
9. Poco::ThreadImpl::runnableEntry(void*) @ 0x120b17da in /usr/bin/clickhouse
10. start_thread @ 0x91c9 in /usr/lib64/libpthread-2.33.9000.so
11. clone @ 0x100463 in /usr/lib64/libc-2.33.9000.so

2021.03.26 09:45:58.978054 [ 259 ] {} <Error> TCPHandler: Code: 261, e.displayText() = DB::Exception: Unknown BlockInfo field number: 227213735, Stack trace:

0. DB::BlockInfo::read(DB::ReadBuffer&) @ 0xe8a6658 in /usr/bin/clickhouse
1. DB::NativeBlockInputStream::readImpl() @ 0xefdd853 in /usr/bin/clickhouse
2. DB::IBlockInputStream::read() @ 0xe8ab0a5 in /usr/bin/clickhouse
3. DB::TCPHandler::receiveUnexpectedData() @ 0xf8c9c35 in /usr/bin/clickhouse
4. DB::TCPHandler::receivePacket() @ 0xf8bfd36 in /usr/bin/clickhouse
5. DB::TCPHandler::runImpl() @ 0xf8b83b2 in /usr/bin/clickhouse
6. DB::TCPHandler::run() @ 0xf8cad69 in /usr/bin/clickhouse
7. Poco::Net::TCPServerConnection::start() @ 0x11f7d83f in /usr/bin/clickhouse
8. Poco::Net::TCPServerDispatcher::run() @ 0x11f7f251 in /usr/bin/clickhouse
9. Poco::PooledThread::run() @ 0x120b5979 in /usr/bin/clickhouse
10. Poco::ThreadImpl::runnableEntry(void*) @ 0x120b17da in /usr/bin/clickhouse
11. start_thread @ 0x91c9 in /usr/lib64/libpthread-2.33.9000.so
12. clone @ 0x100463 in /usr/lib64/libc-2.33.9000.so

2021.03.26 09:45:58.978523 [ 259 ] {} <Error> ServerErrorHandler: Code: 99, e.displayText() = DB::Exception: Unknown packet 11861 from client, Stack trace (when copying this message, always include the lines below):

0. DB::TCPHandler::receivePacket() @ 0xf8bfcfc in /usr/bin/clickhouse
1. DB::TCPHandler::runImpl() @ 0xf8b83b2 in /usr/bin/clickhouse
2. DB::TCPHandler::run() @ 0xf8cad69 in /usr/bin/clickhouse
3. Poco::Net::TCPServerConnection::start() @ 0x11f7d83f in /usr/bin/clickhouse
4. Poco::Net::TCPServerDispatcher::run() @ 0x11f7f251 in /usr/bin/clickhouse
5. Poco::PooledThread::run() @ 0x120b5979 in /usr/bin/clickhouse
6. Poco::ThreadImpl::runnableEntry(void*) @ 0x120b17da in /usr/bin/clickhouse
7. start_thread @ 0x91c9 in /usr/lib64/libpthread-2.33.9000.so
8. clone @ 0x100463 in /usr/lib64/libc-2.33.9000.so
 (version 21.3.3.14 (official build))
```

**Additional context**
As stated before, it reproduces with official RPMs but doesn't reproduce with yandex/clickhouse-{client,server} docker images.
{
    
    words = {"CREATE",       "DATABASE", "IF",     "NOT",       "EXISTS",   "TEMPORARY",   "TABLE",    "ON",          "CLUSTER", "DEFAULT",
             "MATERIALIZED", "ALIAS",    "ENGINE", "AS",        "VIEW",     "POPULATE",    "SETTINGS", "ATTACH",      "DETACH",  "DROP",
             "RENAME",       "TO",       "ALTER",  "ADD",       "MODIFY",   "CLEAR",       "COLUMN",   "AFTER",       "COPY",    "PROJECT",
             "PRIMARY",      "KEY",      "CHECK",  "PARTITION", "PART",     "FREEZE",      "FETCH",    "FROM",        "SHOW",    "INTO",
             "OUTFILE",      "FORMAT",   "TABLES", "DATABASES", "LIKE",     "PROCESSLIST", "CASE",     "WHEN",        "THEN",    "ELSE",
             "END",          "DESCRIBE", "DESC",   "USE",       "SET",      "OPTIMIZE",    "FINAL",    "DEDUPLICATE", "INSERT",  "VALUES",
             "SELECT",       "DISTINCT", "SAMPLE", "ARRAY",     "JOIN",     "GLOBAL",      "LOCAL",    "ANY",         "ALL",     "INNER",
             "LEFT",         "RIGHT",    "FULL",   "OUTER",     "CROSS",    "USING",       "PREWHERE", "WHERE",       "GROUP",   "BY",
             "WITH",         "TOTALS",   "HAVING", "ORDER",     "COLLATE",  "LIMIT",       "UNION",    "AND",         "OR",      "ASC",
             "IN",           "KILL",     "QUERY",  "SYNC",      "ASYNC",    "TEST",        "BETWEEN",  "TRUNCATE",    "USER",    "ROLE",
             "PROFILE",      "QUOTA",    "POLICY", "ROW",       "GRANT",    "REVOKE",      "OPTION",   "ADMIN",       "EXCEPT",  "REPLACE",
             "IDENTIFIED",   "HOST",     "NAME",   "READONLY",  "WRITABLE", "PERMISSIVE",  "FOR",      "RESTRICTIVE", "RANDOMIZED",
             "INTERVAL",     "LIMITS",   "ONLY",   "TRACKING",  "IP",       "REGEXP",      "ILIKE"};
}
void Suggest::loadImpl(Connection & connection, const ConnectionTimeouts & timeouts, size_t suggestion_limit)