add tidy check

.github/workflows/e2e_custom_cl.yml

@@ -15,6 +15,25 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  check_tidy:
+    name: Checks go tidy
+    environment: integration
+    runs-on: ubuntu-latest
+    outputs:
+      projectserum_version: ${{ steps.psversion.outputs.projectserum_version }}
+    steps:
+      - name: Checkout the repo
+        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v3.1.0
+      - uses: evantorrie/mott-the-tidier@477fbfa0a0598b231ea347dcdeb740811b6be5be #v1-beta
+        id: tidy
+        with:
+          gomods: |
+            ./go.mod
+            ./tests/go.mod
+      - run: |
+          if [ "${{ steps.tidy.outputs.changedfiles }}" ne "" ]; then
+            exit 1
+          fi
   get_projectserum_version:
     name: Get ProjectSerum Version
     environment: integration
@@ -74,7 +93,7 @@ jobs:
       id-token: write
       contents: read
     runs-on: ubuntu-latest
-    needs: [e2e_custom_build_artifacts, e2e_custom_build_custom_chainlink_image]
+    needs: [e2e_custom_build_artifacts, e2e_custom_build_custom_chainlink_image, check_tidy]
     env:
       CHAINLINK_COMMIT_SHA: ${{ github.sha }}
       CHAINLINK_ENV_USER: ${{ github.actor }}