Add Dropped Variable Statistics support for MIR#9783

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rastogishubham wants to merge 2 commits intoswiftlang:stable/20240723from rastogishubham:MIRStatsStable

+1,669-302

Commits on Dec 20, 2024

[NFC] Move DroppedVariableStats to its own file (llvm#120711 )
rastogishubham
committed
Add a pass to collect dropped var stats for MIR (llvm#120780 )
rastogishubham
committed