Move ActionsDAG into separate file

Fix Distributed queries finishing (avoid connection resets)

Add "OWNER" to ya.make files.

Fix LLVM's libunwind in the case when CFA register is RAX

Fixed wrong result in big integers (128, 256 bit) when casting from double to int64_t.

throw exception when mysql sync user privs error.

ISSUES-16574 try fix remote query failure when using 'if' suffix aggregate function 

Fix possible error Illegal type of argument for queries with ORDER BY.

Bump protobuf from 3.13.0 to 3.14.0 in /docs/tools

Fix possible stack overflow in materialized views.

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 3.13.0 to 3.14.0.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/master/generate_changelog.py)
- [Commits](https://github.com/protocolbuffers/protobuf/compare/v3.13.0...v3.14.0)
Signed-off-by: Ndependabot-preview[bot] <support@dependabot.com>

Add missing <unique_ptr> for RadixSort.h

Fails compiling quantile-t-digest.cpp test on:
- clang 11
- libstdc++

Add setting remove_empty_parts

Fix ROCKSDB_ERROR value

Trying to fix the unimportant "Arcadia" checks in the CI.

Fix arrayAUC function header in documentation