CI: speedup unit test job (#30995)

* start

* mv to buildjet

* fix
old-commit-hash: e17e66180c3a9432e6d303ca36ff0e4af763dace

.github/workflows/selfdrive_tests.yaml

@@ -163,12 +163,16 @@ jobs:
 
   unit_tests:
     name: unit tests
-    runs-on: ubuntu-20.04
+    runs-on: ${{ ((github.repository == 'commaai/openpilot') &&
+                   ((github.event_name != 'pull_request') || 
+                    (github.event.pull_request.head.repo.full_name == 'commaai/openpilot'))) && 'buildjet-8vcpu-ubuntu-2004' || 'ubuntu-20.04' }}
     steps:
     - uses: actions/checkout@v4
       with:
         submodules: true
     - uses: ./.github/workflows/setup-with-retry
+      with:
+        docker_hub_pat: ${{ secrets.DOCKER_HUB_PAT }}
     - name: Build openpilot
       timeout-minutes: ${{ ((steps.restore-scons-cache.outputs.cache-hit == 'true') && 10 || 30) }} # allow more time when we missed the scons cache
       run: ${{ env.RUN }} "scons -j$(nproc)"