.github: Aggregate e2e matrix jobs into a single status

Signed-off-by: timflannagan <timflannagan@gmail.com>

Author: timflannagan

.github/workflows/e2e-tests.yml

@@ -8,7 +8,7 @@ on:
   pull_request:
   workflow_dispatch:
 jobs:
-  e2e-tests:
+  e2e:
     strategy:
       fail-fast: false
       matrix:
@@ -26,4 +26,16 @@ jobs:
         with:
           name: e2e-test-output-${{ (github.event.pull_request.head.sha || github.sha) }}-${{ github.run_id }}-${{ matrix.parallel-id }}
           path: ${{ github.workspace }}/bin/artifacts/*
-# TODO: create job to combine test artifacts using code in https://github.com/operator-framework/operator-lifecycle-manager/pull/1476
+        # TODO: create job to combine test artifacts using code in https://github.com/operator-framework/operator-lifecycle-manager/pull/1476
+  e2e-tests:
+    if: ${{ always() }}
+    runs-on: ubuntu-latest
+    needs: e2e
+    steps:
+    - run: |
+        echo "Matrix result: ${{ needs.e2e.result }}"
+    - name: check individual matrix results
+      if: ${{ needs.e2e.result == 'failure' }}
+      run: |
+        echo 'Failure: at least one e2e matrix job has failed'
+        exit 1