[clang] [Clang][Diagnostics] Update select uses in DiagnosticXKinds.td to use enum_select (PR #130868)

[Ayokunle Amodu via cfe-commits]

ayokunle321 wrote:

Okay cool. I'll change the option's name but for the .td file, I don't think it had a newline at the end initially (just checked the main repo). I could easily add it but just wanted to clarify. 

And yeah we can merge this one for now and when I'm able to find more I'll make another PR for them.

https://github.com/llvm/llvm-project/pull/130868