[llvm] [DO NOT MERGE] CI verification branch for offload -Wunused-template fix (PR #208492)

[Nick Sarnie via llvm-commits]

sarnex wrote:

FYI you can create a draft PR which will run CI but not ping reviewers until you click "ready for review'

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/creating-a-pull-request#creating-the-pull-request

https://github.com/llvm/llvm-project/pull/208492