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

[Erich Keane via cfe-commits]

erichkeane wrote:

Note tablegen changes undid the 'dealiasing' that we were doing in the manual conversion between types, so many more tests will fail.  Working now to add dealiasing to these functions.

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