[llvm] [TableGen] Eliminate static CodeGenIntrinsicMap in PatternParser (PR #107339)

[Matt Arsenault via llvm-commits]

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

This could possibly go in CodeGenTarget, though technically the intrinsics are always defined and not actually connected to the target 

https://github.com/llvm/llvm-project/pull/107339