**Describe the unexpected behaviour**
On connection with server having self-signed certificate warning message and acceptance request issued twice.

**How to reproduce**
Provide server with self-signed certificate and make a secure connection.

**Expected behavior**
Only one warning message and acceptance request should be issued.

**Error message and/or stacktrace**
```
ubuntu@ip-172-31-42-195:~/ClickHouse-comb/build_debug/programs$ ./clickhouse-client -s --port 9541
ClickHouse client version 22.9.1.1.
Connecting to localhost:9541 as user default.

WARNING: Certificate verification failed
----------------------------------------
Issuer Name:  /CN=another
Subject Name: /CN=another

The certificate yielded the error: self signed certificate

The error occurred in the certificate chain at position 0
Accept the certificate (y,n)? y
Connected to ClickHouse server version 22.9.1 revision 54460.

Warnings:
 * Server was built in debug mode. It will work slowly.

ip-172-31-42-195.us-east-2.compute.internal :)
WARNING: Certificate verification failed
----------------------------------------
Issuer Name:  /CN=another
Subject Name: /CN=another

The certificate yielded the error: self signed certificate

The error occurred in the certificate chain at position 0
Accept the certificate (y,n)?
```
int argc,
    char ** argv,
    Arguments & common_arguments,
    std::vector<Arguments> & external_tables_arguments,
    std::vector<Arguments> & hosts_and_ports_arguments)
{
    /** We allow different groups of arguments:
        * - common arguments;
        * - arguments for any number of external tables each in form "--external args...",
        *   where possible args are file, name, format, structure, types;
        * - param arguments for prepared statements.
        * Split these groups before processing.
        */
    bool in_external_group = false;
    std::string prev_host_arg;
    std::string prev_port_arg;
    for (int arg_num = 1; arg_num < argc; ++arg_num)
    {
        std::string_view arg = argv[arg_num];
        if (arg == "--external")
        {
            in_external_group = true;
            external_tables_arguments.emplace_back(Arguments{""});