[llvm] [DropUnnecessaryAssumes] Add support for operand bundles (PR #160311)

[Ramkumar Ramachandra via llvm-commits]

https://github.com/artagnon approved this pull request.

Thanks, this looks good from my end. I'll let @andjo403 and others have a look.

https://github.com/llvm/llvm-project/pull/160311