[clang] [PAC][clang] Define `PointerAuthQualifier` and `PointerAuthenticationMode` (PR #84384)

[Daniil Kovalev via cfe-commits]

kovdan01 wrote:

Although functions in this file use different code styles for function arguments (both `camelCase` and `PascalCase`), I've changed the code style for function arguments of newly added functions to `PascalCase` as described in https://llvm.org/docs/CodingStandards.html#name-types-functions-variables-and-enumerators-properly - see 3517033bd3a8b676abd649562bcfc7eb4d278d09.

I could also submit a subsequent PR fixing the code style  of function parameters in clang/include/clang/AST/Type.h and clang/include/clang/AST/ASTContext.h which are not in `PascalCase`. Please let me know if there are any objections on this.



https://github.com/llvm/llvm-project/pull/84384