tests: one file for safety and coverage tests (#1865)

* one file for all tests

* clean up

* unreachable

* Revert "unreachable"

This reverts commit 4b792b1f9b5290b57975d21c24be5029be16b0e3.

.github/workflows/test.yaml

@@ -89,23 +89,6 @@ jobs:
                           scons -j$(nproc) ${{ matrix.flags }} && \
                           tests/safety/test.sh"
 
-  safety_coverage:
-    name: safety coverage
-    runs-on: ubuntu-20.04
-    timeout-minutes: 20
-    steps:
-      - uses: actions/checkout@v2
-      - name: Build Docker image
-        run: eval "$BUILD"
-      - name: Run safety coverage test
-        timeout-minutes: 5
-        run: |
-          ${{ env.RUN }} "cd .. && \
-                          scons -c && \
-                          scons -j$(nproc) opendbc/ cereal/ && \
-                          cd panda/tests/safety && \
-                          ./test_coverage.sh"
-
   misra:
     name: MISRA C:2012
     runs-on: ubuntu-20.04