CI: run plotjuggler test on mac (#29102)

* CI: run plotjuggler test on mac

* source

* python path

.github/workflows/selfdrive_tests.yaml

@@ -136,6 +136,11 @@ jobs:
       run: |
         source tools/openpilot_env.sh
         poetry run scons -j$(nproc)
+    - name: Run tests
+      run: |
+        source tools/openpilot_env.sh
+        export PYTHONPATH=$PWD
+        poetry run tools/plotjuggler/test_plotjuggler.py
     - name: Pre Cache - Cleanup scons cache
       if: github.ref == 'refs/heads/master'
       run: |