[release/5.0] Fix GC hole with STOREIND of LCL_VAR_ADDR/LCL_FLD_ADDR

Backport of (part of) dotnet#45818 to release/5.0

Fixes: dotnet#45557

Reported by Roslyn. Bad GC info can lead to an unexplained crash that can't easily be found or worked around.

Manual, new unit test, CLR outerloop, SuperPMI asm diffs.

Low

Author: BruceForstall

src/coreclr/src/jit/emitxarch.cpp

@@ -3113,7 +3113,7 @@ void emitter::emitInsStoreInd(instruction ins, emitAttr attr, GenTreeStoreInd* m
         }
 
         // Updating variable liveness after instruction was emitted
-        codeGen->genUpdateLife(varNode);
+        codeGen->genUpdateLife(mem);
         return;
     }