[clang] Allow the no_stack_protector attribute on local variables (PR #173311)

[Aaron Ballman via cfe-commits]

https://github.com/AaronBallman commented:

Thank you! I think this is missing some Sema tests for things like applying the attribute to a non-local variable, a static local variable, a non-variable, and being given an argument list. I'd expect each of those to end up being diagnosed, so we want to verify the diagnostics are issued and reasonable.

https://github.com/llvm/llvm-project/pull/173311