[clang-tools-extra] [clang-tidy][doc][NFC] extract common global options in doc (PR #119842)

[Carlos Galvez via cfe-commits]

carlosgalvezp wrote:

I think the confusion comes from calling these "Global Options". They are not global, they "exist in multiple checks", however they can (and probably should) change independently of each other. My understanding is that the scope of this NFC patch is to DRY the documentation and put it in a common place like we do with regular code.

Like I wrote in the code comments, I don't believe we should DRY the documentation, as it makes it less usable. The clearest issue to tackle IMO would be  https://github.com/llvm/llvm-project/issues/113577 

https://github.com/llvm/llvm-project/pull/119842