JIT: Detect inconsistency in small profile weights for finally exits

[amanasifkhalid]

Fixes #114229.

[Copilot]

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Comments suppressed due to low confidence (2)

src/coreclr/jit/importer.cpp:12646

• Removing the likelihood setting could affect the weight distribution of the flow edge; please verify that this change aligns with the intended profiling behavior for finally exits.

newEdge->setLikelihood(1.0 / predCount);

src/coreclr/jit/importer.cpp:12688

• [nitpick] Ensure that the new fgProfileWeightsConsistentOrSmall function correctly handles all edge cases, specifically when small but significant weights are involved, to avoid misclassification of consistency.

profileConsistent &= fgProfileWeightsConsistentOrSmall(callFinally->bbWeight, callFinallyRet->bbWeight);

[amanasifkhalid]

/azp run runtime-coreclr libraries-pgo

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[amanasifkhalid]

cc @dotnet/jit-contrib, @AndyAyersMS PTAL. No diffs. Test failures look unrelated, as I don't see any new profile consistency asserts. Thanks!

[amanasifkhalid]

/ba-g blocked by test timeouts