[clang] [llvm] [NFC] Run code formatter on Diagnostic.h/cpp ProfileList.cpp SpecialCaseList.cpp (PR #140316)

[Qinkun Bao via cfe-commits]

qinkunbao wrote:

> But I guess convention is to reformat only parts you are going to change - less noise in blame output, and less conflict resolution for others who have pending PRs here.

Thank you for the comments. Yeah, I am changing these files. I feel like reformatting these files makes the future PRs more clean. 

The most changes are from [Diagnostic.h] and  [Diagnostic.cpp]. According to the history, there files are not changed frequently (four times this year). So I guess it won't cause much troubles for others who have pending PRs.  

https://github.com/llvm/llvm-project/pull/140316