delete unused testing files, use reusable workflow for CI

.github/workflows/CI.yml

@@ -1,62 +1,19 @@
 name: CI
 
-on: [push]
+on: [push, workflow_dispatch] # allow manual call
 
 jobs:
-  build-and-test-linux:
+  get-branch:
     runs-on: ubuntu-latest
-    strategy:
-      max-parallel: 5
-    env: # update this if needed to match a pull request on the RMG-database
-      RMG_PY_BRANCH: main
-    defaults:
-      run:
-        shell: bash -l {0}
+    outputs:
+      branch: ${{ steps.extract_branch.outputs.branch }}
     steps:
-      - uses: actions/checkout@v2
-      - name: Get RMG-Py source code
-        run: |
-          cd ..
-          git clone -b $RMG_PY_BRANCH https://github.com/ReactionMechanismGenerator/RMG-Py.git
-          cd RMG-Py
-          git clone -b arkanepy3 https://github.com/mjohnson541/Q2DTor.git external/Q2DTor
-      - uses: conda-incubator/setup-miniconda@v2
-        with:
-          environment-file: ../RMG-Py/environment.yml
-          python-version: 3.7
-          activate-environment: rmg_env
-      - name: Conda info
-        run: |
-          conda info
-          conda list
-      - name: Install MOPAC
-        env:
-          MOPACKEY: ${{ secrets.MOPACKEY }}
-        timeout-minutes: 1
-        continue-on-error: true # allowed to fail on pull request from a forked repository
-        run: |
-          set +o pipefail
-          yes 'Yes' | ${CONDA_PREFIX}/bin/mopac "$MOPACKEY"
-      - name: Compile RMG
-        run: |
-          cd ../RMG-Py
-          make
-      - name: Trigger RMG-tests
-        if: ${{ github.event_name == 'push' && github.ref != 'refs/heads/main' && github.ref != 'refs/heads/stable' }} # only push events to branches other than main and stable
-        env:
-          GH_TOKEN: ${{ secrets.RMG_DEV_TOKEN }}
-        run: ./trigger-rmg-tests.sh
-      - name: Unit tests
-        run: |
-          cd ../RMG-Py
-          make test-unittests
-      - name: Functional tests
-        if: ${{ success() || failure() }} # Run even if the unit tests failed (but not if they were cancelled)
-        run: |
-          cd ../RMG-Py
-          make test-functional
-      - name: Database tests
-        if: ${{ success() || failure() }} # Run even if the functional tests failed (but not if they were cancelled)
-        run: |
-          cd ../RMG-Py
-          make test-database
+      - name: Extract branch name
+        shell: bash
+        run: echo "branch=${GITHUB_HEAD_REF:-${GITHUB_REF#refs/heads/}}" >> $GITHUB_OUTPUT
+        id: extract_branch
+  rmg-py-ci:
+    needs: get-branch
+    uses: ReactionMechanismGenerator/RMG-Py/.github/workflows/CI.yml@main
+    with:
+      rmg-db-branch: ${{ needs.get-branch.outputs.branch }}