**Describe the bug**
If you try to rename column, which has any skip index on it, you will get an exception.

**How to reproduce**
```
DROP TABLE IF EXISTS t_ind;

CREATE TABLE t_ind
(
  a UInt32,
  INDEX i a TYPE minmax GRANULARITY 1
)
ENGINE = MergeTree
ORDER BY tuple();

INSERT INTO t_ind SELECT number from numbers(100);

SELECT count() FROM t_ind where a > 50;

ALTER TABLE t_ind RENAME COLUMN a TO b;

SELECT count() FROM t_ind where a > 50;

DROP TABLE IF EXISTS t_ind;
```

Stacktrace:
```
2020.07.09 00:27:44.712766 [ 17109 ] {1cfc1d3a-eb81-4564-998b-350ec3d3f07c} <Error> executeQuery: Code: 47, e.displayText() = DB::Exception: Missing columns: 'a' while processing query: 'a', required columns: 'a', source columns: 'b' (version 20.6.1.1) (from [::1]:55430) (in query: ALTER TABLE t_ind RENAME COLUMN a TO b; ), Stack trace (when copying this message, always include the lines below):

0. /home/ap11/ClickHouse/build_clang/../contrib/libcxx/include/exception:129: Poco::Exception::Exception(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, int) @ 0x103600cc in /home/ap11/ClickHouse/build_clang/programs/clickhouse
1. /home/ap11/ClickHouse/build_clang/../src/Common/Exception.cpp:38: DB::Exception::Exception(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, int) @ 0x9ada249 in /home/ap11/ClickHouse/build_clang/programs/clickhouse
2. /home/ap11/ClickHouse/build_clang/../src/Interpreters/SyntaxAnalyzer.cpp:0: DB::SyntaxAnalyzerResult::collectUsedColumns(std::__1::shared_ptr<DB::IAST> const&, bool) @ 0xe0e84aa in /home/ap11/ClickHouse/build_clang/programs/clickhouse
3. /home/ap11/ClickHouse/build_clang/../contrib/libcxx/include/new:253: DB::SyntaxAnalyzer::analyze(std::__1::shared_ptr<DB::IAST>&, DB::NamesAndTypesList const&, std::__1::shared_ptr<DB::IStorage const>, std::__1::shared_ptr<DB::StorageInMemoryMetadata const> const&, bool) const @ 0xe0ef371 in /home/ap11/ClickHouse/build_clang/programs/clickhouse
4. /home/ap11/ClickHouse/build_clang/../contrib/libcxx/include/memory:4206: DB::IndexDescription::getIndexFromAST(std::__1::shared_ptr<DB::IAST> const&, DB::ColumnsDescription const&, DB::Context const&) @ 0xe20c272 in /home/ap11/ClickHouse/build_clang/programs/clickhouse
5. /home/ap11/ClickHouse/build_clang/../src/Storages/IndicesDescription.cpp:122: DB::IndexDescription::recalculateWithNewColumns(DB::ColumnsDescription const&, DB::Context const&) @ 0xe20cf71 in /home/ap11/ClickHouse/build_clang/programs/clickhouse
6. /home/ap11/ClickHouse/build_clang/../contrib/libcxx/include/iterator:1480: DB::AlterCommands::apply(DB::StorageInMemoryMetadata&, DB::Context const&) const @ 0xe1f645e in /home/ap11/ClickHouse/build_clang/programs/clickhouse
7. /home/ap11/ClickHouse/build_clang/../contrib/libcxx/include/__hash_table:90: DB::MergeTreeData::checkAlterIsPossible(DB::AlterCommands const&, DB::Settings const&) const @ 0xe3e2a53 in /home/ap11/ClickHouse/build_clang/programs/clickhouse
8. /home/ap11/ClickHouse/build_clang/../contrib/libcxx/include/memory:3826: DB::InterpreterAlterQuery::execute() @ 0xde8eaa6 in /home/ap11/ClickHouse/build_clang/programs/clickhouse
9. /home/ap11/ClickHouse/build_clang/../src/Interpreters/executeQuery.cpp:0: DB::executeQueryImpl(char const*, char const*, DB::Context&, bool, DB::QueryProcessingStage::Enum, bool, DB::ReadBuffer*) @ 0xe124073 in /home/ap11/ClickHouse/build_clang/programs/clickhouse
10. /home/ap11/ClickHouse/build_clang/../src/Interpreters/executeQuery.cpp:653: DB::executeQuery(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, DB::Context&, bool, DB::QueryProcessingStage::Enum, bool) @ 0xe12344e in /home/ap11/ClickHouse/build_clang/programs/clickhouse
11. /home/ap11/ClickHouse/build_clang/../src/Server/TCPHandler.cpp:0: DB::TCPHandler::runImpl() @ 0xe589ba7 in /home/ap11/ClickHouse/build_clang/programs/clickhouse
12. /home/ap11/ClickHouse/build_clang/../src/Server/TCPHandler.cpp:0: DB::TCPHandler::run() @ 0xe592067 in /home/ap11/ClickHouse/build_clang/programs/clickhouse
13. /home/ap11/ClickHouse/build_clang/../contrib/poco/Net/src/TCPServerConnection.cpp:57: Poco::Net::TCPServerConnection::start() @ 0x102e0587 in /home/ap11/ClickHouse/build_clang/programs/clickhouse
14. /home/ap11/ClickHouse/build_clang/../contrib/libcxx/include/atomic:1036: Poco::Net::TCPServerDispatcher::run() @ 0x102e0a08 in /home/ap11/ClickHouse/build_clang/programs/clickhouse
15. /home/ap11/ClickHouse/build_clang/../contrib/poco/Foundation/src/ThreadPool.cpp:213: Poco::PooledThread::run() @ 0x103bbe77 in /home/ap11/ClickHouse/build_clang/programs/clickhouse
16. /home/ap11/ClickHouse/build_clang/../contrib/poco/Foundation/include/Poco/SharedPtr.h:156: Poco::ThreadImpl::runnableEntry(void*) @ 0x103b9e36 in /home/ap11/ClickHouse/build_clang/programs/clickhouse
17. start_thread @ 0x76db in /lib/x86_64-linux-gnu/libpthread-2.27.so
18. /build/glibc-OTsEL5/glibc-2.27/misc/../sysdeps/unix/sysv/linux/x86_64/clone.S:97: __GI___clone @ 0x12188f in /usr/lib/debug/lib/x86_64-linux-gnu/libc-2.27.so
```
#include <Interpreters/ExpressionActions.h>
#include <Interpreters/addTypeConversionToAST.h>
#include <Interpreters/ExpressionAnalyzer.h>
#include <Interpreters/SyntaxAnalyzer.h>
#include <Interpreters/RenameColumnVisitor.h>
#include <Parsers/ASTAlterQuery.h>
#include <Parsers/ASTColumnDeclaration.h>
#include <Parsers/ASTConstraintDeclaration.h>
#include <Parsers/ASTExpressionList.h>
#include <Parsers/ASTFunction.h>
#include <Parsers/ASTIdentifier.h>
#include <Parsers/ASTIndexDeclaration.h>
#include <Parsers/ASTLiteral.h>
#include <Parsers/ASTSetQuery.h>
#include <Storages/AlterCommands.h>
#include <Storages/IStorage.h>
#include <Common/typeid_cast.h>
#include <Parsers/queryToString.h>
namespace DB
{
namespace ErrorCodes
{
    extern const int ILLEGAL_COLUMN;
    extern const int BAD_ARGUMENTS;
    extern const int NOT_FOUND_COLUMN_IN_BLOCK;
    extern const int LOGICAL_ERROR;
    extern const int DUPLICATE_COLUMN;
    extern const int NOT_IMPLEMENTED;
}
std::optional<AlterCommand> AlterCommand::parse(const ASTAlterCommand * command_ast, bool sanity_check_compression_codecs)