[clang-tools-extra] [clangd] Add 'apply all clangd fixes' and 'apply all '_' fixes' QuickFixes (PR #79867)

[Nathan Ridge via cfe-commits]

HighCommander4 wrote:

> @HighCommander4 I'm just wondering, have you had a chance to check out this PR yet? If not, is there any chance you could find some time for it in the coming weeks or months?

My apologies, this has been languishing in my review queue and I haven't quite managed to get to it. Will do my best to make time for it in the coming weeks, but I've also added @llvm-beanz as another potential reviewer, in case he gets to it before I do :)

https://github.com/llvm/llvm-project/pull/79867