[clang] [CIR][NFC] Upstream EHPersonality for function (PR #164883)

[Bruno Cardoso Lopes via cfe-commits]

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@@ -257,5 +258,53 @@ inline void EHScopeStack::popCatch() {
   deallocate(EHCatchScope::getSizeForNumHandlers(scope.getNumHandlers()));
 }
 
+/// The exceptions personality for a function.
+struct EHPersonality {
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bcardosolopes wrote:

If you have the time it would be great to follow up on some of these refactoring (so it can open the road for easily incorporating later ones) before the GSoC term ends! Thanks again for working on this

https://github.com/llvm/llvm-project/pull/164883