Continuation of #9226.

We have strict guidelines for our code base:

• don't use source codes or libraries from OS or repositories;
• build everything from source code;
• use fixed versions of the libraries, no automatic updates;
• all source code of third-party dependencies is checked out;
• all the code can be built with sanitizers and hardening;
• no known memory safety issues exist;
• reproducible (byte-identical), hermetic builds;
• all the code can be cross-compiled;
• minimize the supply chain;
• minimize runtime dependencies on the files on the target machine;
• single-binary distribution;
• static linking;
• no foreign code or plugins can run in the program address space;

CMake is not a modular system, that's why using third-party CMake files is a bad idea.

The list of remaining libraries where we still reuse some CMake code:

• abseil-cpp
• flatbuffers
• qpl
• ssh
• cassandra
• llvm
• grpc
• c-ares