[clang] [OpenMP] Add variable capture support for transparent clause expression. (PR #185419)

[Abhinav Gaba via cfe-commits]

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

Thanks for the changes and the comments! They makes things easier to follow. I mistook the task being empty, rather than nested :)

https://github.com/llvm/llvm-project/pull/185419