[clang] [OpenMP] Fix infinite loop on recursive initializers (PR #126269)

[via cfe-commits]

llvmbot wrote:

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Failed to cherry-pick: 605a9e37b64b5b5647f1f3e560f7ffe31157841c

https://github.com/llvm/llvm-project/actions/runs/13206970400

Please manually backport the fix and push it to your github fork.  Once this is done, please create a [pull request](https://github.com/llvm/llvm-project/compare)

https://github.com/llvm/llvm-project/pull/126269