[clang] [llvm] [OpenACC] Switch Clang to use the Flang 'appertainment' rules for cla… (PR #135372)

[Valentin Clement バレンタイン クレメン via llvm-commits]

clementval wrote:

> @clementval @razvanlupusoru
> 
> This should now be ready, though it probably has to be merged with the flang changes after `num_gangs`/`num_workers`/`vector_length` changes are made.

Working on that right now. 

> MOST of this ended up being test changes as we went along, But the tablegen/ACC.td changes/etc are mostly what I want you guys to look at. SemaOpenACCAppertainment.cpp is where all of the changes related to using ACC.td are located.

Will check. Thanks for all the updates and making this consistent

https://github.com/llvm/llvm-project/pull/135372