[llvm] workflows/release-binaries: Enable PGO (PR #124442)

[Carlo Cabrera via llvm-commits]

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@@ -259,7 +256,7 @@ jobs:
       shell: bash
       run: |
         find ${{ steps.setup-stage.outputs.build-prefix }}/build -iname ${{ needs.prepare.outputs.release-binary-filename }} -delete
-        rm -Rf ${{ steps.setup-stage.outputs.build-prefix }}/build/tools/clang/stage2-bins/_CPack_Packages
+        find ${{ steps.setup-stage.outputs.build-prefix }}/build -iname _CPack_Packages -prune -exec rm -r {} \;
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carlocab wrote:

```suggestion
        find ${{ steps.setup-stage.outputs.build-prefix }}/build -iname _CPack_Packages -prune -exec rm -r {} +
```
Might be more efficient.

https://github.com/llvm/llvm-project/pull/124442