connectors-ci: early exit when no connector changes (airbytehq#35578)

Author: alafanechere

.github/workflows/connectors_tests.yml

@@ -22,7 +22,45 @@ on:
       - opened
       - synchronize
 jobs:
+  changes:
+    runs-on: ubuntu-latest
+    outputs:
+      connectors: ${{ steps.changes.outputs.connectors }}
+    permissions:
+      statuses: write
+    steps:
+      - name: Checkout Airbyte
+        if: github.event_name != 'pull_request'
+        uses: actions/checkout@v3
+      - id: changes
+        uses: dorny/paths-filter@v2
+        with:
+          # Note: expressions within a filter are OR'ed
+          filters: |
+            connectors:
+              - '*'
+              - 'airbyte-ci/**/*'
+              - 'airbyte-integrations/connectors/**/*'
+              - 'airbyte-cdk/**/*'
+              - 'buildSrc/**/*'
+      # The Connector CI Tests is a status check emitted by airbyte-ci
+      # We make it pass once we have determined that there are no changes to the connectors
+      - name: "Skip Connectors CI tests"
+        if: steps.changes.outputs.connectors != 'true' && github.event_name == 'pull_request'
+        run: |
+          curl --request POST \
+          --url https://api.github.com/repos/${{ github.repository }}/statuses/${{ github.event.pull_request.head.sha }} \
+          --header 'authorization: Bearer ${{ secrets.GITHUB_TOKEN }}' \
+          --header 'content-type: application/json' \
+          --data '{
+            "state": "success",
+            "context": "Connectors CI tests",
+            "target_url": "${{ github.event.workflow_run.html_url }}"
+            }' \
+
   connectors_ci:
+    needs: changes
+    if: needs.changes.outputs.connectors == 'true'
     name: Connectors CI
     runs-on: connector-test-large
     timeout-minutes: 1440 # 24 hours