Revert "feat: Use profile-generate to replace outdated -Zprofile options"

[sylvestre]

Reverts #2282

[Xuanwo]

Hi, reverting this will break all stable Rust. I believe it's better to provide forward compatibility instead, allowing sccache to also accept -Z simultaneously.

[sylvestre]

@Xuanwo sorry for the lack of context. It caused some significant regressions in term of build for firefox:
https://bugzilla.mozilla.org/show_bug.cgi?id=1937804

[Xuanwo]

@Xuanwo sorry for the lack of context. It caused some significant regressions in term of build for firefox: bugzilla.mozilla.org/show_bug.cgi?id=1937804

Got it. Let me find sometime tomorrow to see how can we fix this.

[glandium]

See my comment in #2282. Considering the support for --profile-generate is wrong, fixing the whole thing is going to amount to essentially revert this and reintroduce --profile-generate in a simpler form. All in all, it's going to be simpler to start from the reverted state.

[sylvestre]

@Xuanwo have you been able to have a look?
Thanks :)