Shrink LLVM artifact to minimal size

[georgik]

Rust compiler does not need whole llvm-project artifact.
Smaller artifact can make images and deployment smaller which leads to quick container spin-up and smaller footprint in registries.
Research options to shrink the artifact.

[georgik]

LLVM could be reduced down to following items:

./lib/clang/14.0.0/include/*
./lib/libclang.so.14.0.0

Testing implementation done for Linux x86_64

[georgik]

Shrinked. Expect Windows. For some reason LLVM was not working properly.
Windows will be handled in separate issue.