ci: libc-0.2: Don't specify needs for tier 2 jobs

On `main` we require that the tier 1 tests pass before running tier 2 jobs in an effort to avoid spending CI time when things would fail smoke checks. `libc-0.2` has a bit of a different flow though: most PRs are bulk backports that contain a number of patches which have already been validated once on `main`. To speed up the backport process a bit, remove `needs:` so all jobs start at the same time.

Author: tgross35

.github/workflows/ci.yaml

@@ -163,9 +163,9 @@ jobs:
  path: ${{ env.ARCHIVE_PATH }}
  retention-days: 5
 
+ # Unlike `main` this job doesn't have `needs`, in order to speed up backports a bit
  test_tier2:
  name: Test tier2
- needs: [test_tier1, style_check]
  runs-on: ubuntu-24.04
  strategy:
  fail-fast: true
@@ -270,7 +270,6 @@ jobs:
 
  test_tier2_vm:
  name: Test tier2 VM
- needs: [test_tier1, style_check]
  runs-on: ubuntu-latest
  strategy:
  fail-fast: true