Rollup merge of #138396 - Kobzol:ci-metrics, r=marcoieni

Enable metrics and verbose tests in PR CI

When debugging CI, I relatively often need to examine what tests are executed on PR CI, and what bootstrap steps does it execute. However, we currently disable both verbose tests and bootstrap metrics on PR CI for some reason.

I'm not actually sure why though, as the PR that (probably) introduced this behavior (rust-lang/rust#51367) didn't explain why.

CC `@oli-obk`

Author: jhpratt