Auto merge of #132646 - jieyouxu:liberate-aarch64-gnu-debug, r=Kobzol

Liberate `aarch64-gnu-debug` from the shackles of `--test-args=clang`

### Changes

- Drop `--test-args=clang` from `aarch64-gnu-debug` so run-make tests that are `//@ needs-force-clang-based-tests` no longer only run if their test name contains `clang` (which is a very cool footgun).
- Reorganize run-make-suport library slightly to accommodate a raw gcc invocation.
- Fix `tests/run-make/mte-ffi/rmake.rs` to use `gcc` instead of *a* c compiler.

try-job: aarch64-gnu
try-job: aarch64-gnu-debug