[clang-tools-extra] [clang-tidy][NFC] Enable RemoveSemicolon in clang-format config (PR #176926)

[Baranov Victor via cfe-commits]

vbvictor wrote:

> Shouldn't Clang's `-Wextra-semi` and `-Wextra-semi-stmt` be enabled and enforced across LLVM code base?

Currently we only have 
https://github.com/llvm/llvm-project/blob/main/llvm/cmake/modules/HandleLLVMOptions.cmake#L845

For now I don't know the process of enabling new options, I suppose it should go via RFC?
If I add to cmake
```
add_flag_if_supported("-Wextra-semi" EXTRA_SEMI_FLAG)                                                                                                                     
add_flag_if_supported("-Wextra-semi-stmt" EXTRA_SEMI_STMT_FLAG) 
``` 
It start to diagnose a lot of places, so It may take some time to clean up everything.

https://github.com/llvm/llvm-project/pull/176926