[clang-tools-extra] [clang-tidy] Added Conflicting Global Accesses checker (PR #130421)

[Piotr Zegar via cfe-commits]

https://github.com/PiotrZSL commented:

Not sure about name, some simpler name would be better.
Missing documentation/release notes.

Add check need to be simplified.


https://github.com/llvm/llvm-project/pull/130421