Rollup merge of #144112 - Enselic:no-debuginfo-in-codegen, r=Mark-Simulacrum

bootstrap: Ignore `rust.debuginfo-level-tests` for codegen tests

As dicussed in rust-lang/rust#61117 (comment), codegen tests typically depend on the raw LLVM IR output and are sensitive to debuginfo level. So do not apply `rust.debuginfo-level-tests` for codegen tests.

Before this commit:

    $ ./x test --set rust.debuginfo-level-tests=2 tests/codegen --force-rerun
    test result: FAILED. 654 passed; 136 failed; 75 ignored; 0 measured; 0 filtered out; finished in 3.22s

After this commit:

    $ ./x test --set rust.debuginfo-level-tests=2 tests/codegen --force-rerun
    NOTE: ignoring `rust.debuginfo-level-tests=2` for codegen tests
    test result: ok. 790 passed; 0 failed; 75 ignored; 0 measured; 0 filtered out; finished in 3.21s

### Run this in CI?

Maybe it will make sense to add this to CI later but I think it is too early to do now before more non-codegen tests work with `rust.debuginfo-level-tests=2`.

Author: GuillaumeGomez