[clang] [clang] Add support for new loop attribute [[clang::code_align()]] (PR #70762)

[via cfe-commits]

smanna12 wrote:

Thank you @erichkeane and @AaronBallman for reviews and feedbacks.

>>Please be sure to add a reasonable description to the patch summary so that reviewers know more about what's going on, but thank you for already having written docs (that helps give context).

I have added description to the patch summary.

>>The changes should come with a release note as well.

Sure, I will add a release note.

https://github.com/llvm/llvm-project/pull/70762