[clang] [CIR] Forward a byref argument loaded from a byref parameter (PR #221057)

[Andy Kaylor via cfe-commits]

https://github.com/andykaylor approved this pull request.

lgtm assuming a follow up resolve the use of `byref` which doesn't seem to be set by this PR.

https://github.com/llvm/llvm-project/pull/221057