[llvm-branch-commits] [NFC][WebAssembly] Move WebAssemblyCoalesceFeaturesAndStripAtomics (PR #209046)

[Aiden Grossman via llvm-branch-commits]

https://github.com/boomanaiden154 created https://github.com/llvm/llvm-project/pull/209046

Move WebAssemblyCoalesceFeaturesAndStripAtomics to a separate file.
Having a pass implemented directly in the TargetMachine file is a bit
weird.