[clang] [Clang][Coroutines] Don't emit fake uses for coroutine parameters (PR #194690)

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llvmbot wrote:

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Failed to cherry-pick: [efb01c1](https://github.com/llvm/llvm-project/commit/efb01c1bf558eaaf8ec64e1a54110584e827f21b)

https://github.com/llvm/llvm-project/actions/runs/25382207306

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/194690