Give linting steps a unique prefix (#90705)
Give a unique prefix to all steps in lint.yml which catch valid linter errors. This will let retrybot identify lint.yml steps which should not be retried.
This is a prelude to https://github.com/pytorch/test-infra/pull/1275 which extends the retry-on-failure behavior to all PRs in addition to trunk.
This hadn't been an issue previously since we would always only linter failures on `master`, where linter failures were always safe to retry since legitimate linter failures there are virtually non-existent
Pull Request resolved: https://github.com/pytorch/pytorch/pull/90705
Approved by: https://github.com/huydhn, https://github.com/malfet
