set_exposure_target test (#20318)

* build

* remove junk

* clean up

* clean up rebase

* new patterns

* add gts

* add to jenkis

* this more useful

* typo

* test only

* Update Jenkinsfile

* test flag

* remove from jenkins

* these should all just be common:wq

* oops

* unigt

* add to unit tests?

* build all is fine

Co-authored-by: Comma Device <device@comma.ai>
old-commit-hash: 65bb979c34

.github/workflows/selfdrive_tests.yaml

@@ -195,7 +195,7 @@ jobs:
       run: eval "$BUILD"
     - name: Run unit tests
       run: |
-        ${{ env.RUN }} "scons -j$(nproc) && \
+        ${{ env.RUN }} "scons -j$(nproc) --test && \
                         coverage run selfdrive/test/test_fingerprints.py && \
                         $UNIT_TEST common && \
                         $UNIT_TEST opendbc/can && \
@@ -207,7 +207,8 @@ jobs:
                         $UNIT_TEST selfdrive/locationd && \
                         $UNIT_TEST selfdrive/athena && \
                         $UNIT_TEST selfdrive/thermald && \
-                        $UNIT_TEST tools/lib/tests"
+                        $UNIT_TEST tools/lib/tests && \
+                        ./selfdrive/camerad/test/ae_gray_test"
     - name: Upload coverage to Codecov
       run: bash <(curl -s https://codecov.io/bash) -v -F unit_tests