[clang] [llvm] [win][aarch64] Always reserve frame pointers for Arm64 Windows (PR #146582)

[David Spickett via llvm-commits]

DavidSpickett wrote:

The warning:
```
RUN: at line 1 has no command after substitutions
```
Is because the test looks for the wrong target to be enabled, this will be fixed by: https://github.com/llvm/llvm-project/pull/146869

It's not the cause of the failure.

https://github.com/llvm/llvm-project/pull/146582