Update hash of the new CSE when resizing (#61984)

The CSE logic maintains a custom hashtable implementation.

It triggers a resize at the same time as adding a new CSE,
but forgets the hash of the new CSE needs to be updated from
its pre-resize value. Failing to do so can lead to losing some
CSEs, though not in a correctness-impacting way.

src/coreclr/jit/optcse.cpp

@@ -655,6 +655,7 @@ unsigned Compiler::optValnumCSE_Index(GenTree* tree, Statement* stmt)
                     }
                 }
 
+                hval                           = optCSEKeyToHashIndex(key, newOptCSEhashSize);
                 optCSEhash                     = newOptCSEhash;
                 optCSEhashSize                 = newOptCSEhashSize;
                 optCSEhashMaxCountBeforeResize = optCSEhashMaxCountBeforeResize * s_optCSEhashGrowthFactor;