[clang] [CIR] Support single level Cleanup scope (PR #180276)

[Amr Hesham via cfe-commits]

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@@ -309,6 +354,9 @@ void CIRGenFunction::popCleanupBlock() {
     assert(!cir::MissingFeatures::ehCleanupScopeRequiresEHCleanup());
     ehStack.popCleanup();
     scope.markEmitted();
+
+    mlir::OpBuilder::InsertionGuard guard(builder);
+    builder.setInsertionPointToStart(&cleanScope.getCleanupRegion().back());
     emitCleanup(*this, cleanup, cleanupFlags);
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AmrDeveloper wrote:

I have one terminator interested in cleaning up the body from the start, and the other one I inserted into the scope body before i pop the Scope, I will apply the changes and try locally

https://github.com/llvm/llvm-project/pull/180276