feat: Use profile-generate to replace outdated -Zprofile options

[Xuanwo]

Related to mozilla/grcov#1240

I start this PR to fix the main branch's CI failure, but find out that we need to use profile-generate to replace outdated -Zprofile options.

Refer https://doc.rust-lang.org/rustc/profile-guided-optimization.html for more information.

[Xuanwo]

cc @sylvestre would you like to take a look? This PR will address the failing CI on main.

[Xuanwo]

Snap workflow has been disable since it never works.

https://github.com/mozilla/sccache/actions/runs/11701499882/job/32587729982?pr=2282

Exported credentials are no longer valid for the Snap Store.
Recommended resolution: Run export-login and update SNAPCRAFT_STORE_CREDENTIALS.
For more information, check out: https://snapcraft.io/docs/snapcraft-authentication
Full execution log: '/home/runner/.local/state/snapcraft/log/snapcraft-20241106-102321.213818.log'

[sylvestre]

thanks !

[glandium]

I think we should revert this change because:

• It broke support for command lines that contain any other -Z flag
• It broke support for -Zprofile, which may still be used with older version of rustc
• It tracks a profraw file that is irrelevant: it would be the equivalent to gcda, not gcno. And actually it never exists, because even when the program is run and a profraw file is generated, its name is different.

[Xuanwo]

Hi, I reviewed all the documentation for Instrumentation-based Code Coverage and Profile-guided Optimization and now understand the mistake pointed out by @glandium. (Thank you for that!) I’m currently working on it and will restore everything back to normal.