Moving Find FAIL-CI check to GHA (#5377)

.github/workflows/checks-quick.yml

@@ -156,3 +156,28 @@ jobs:
             git diff
             exit 1
           fi
+  check-fail-ci:
+    runs-on: ubuntu-latest
+    container:
+      # there's no "rg" in ci-unified, and tools is a smaller image anyway
+      image: "paritytech/tools:latest"
+      # paritytech/tools uses "nonroot" user by default, which doesn't have enough
+      # permissions to create GHA context
+      options: --user root
+    steps:
+      - name: Fetch latest code
+        uses: actions/checkout@v4
+      - name: Check
+        run: |
+          set +e
+          rg --line-number --hidden --type rust --glob '!{.git,target}' "$ASSERT_REGEX" .; exit_status=$?
+          if [ $exit_status -eq 0 ]; then
+            echo "$ASSERT_REGEX was found, exiting with 1";
+            exit 1;
+            else
+            echo "No $ASSERT_REGEX was found, exiting with 0";
+            exit 0;
+          fi
+        env:
+          ASSERT_REGEX: "FAIL-CI"
+          GIT_DEPTH: 1

.gitlab/pipeline/check.yml

@@ -122,26 +122,6 @@ check-runtime-migration-rococo:
     URI: "wss://rococo-try-runtime-node.parity-chains.parity.io:443"
     SUBCOMMAND_EXTRA_ARGS: "--no-weight-warnings"
 
-find-fail-ci-phrase:
-  stage: check
-  variables:
-    CI_IMAGE: "paritytech/tools:latest"
-    ASSERT_REGEX: "FAIL-CI"
-    GIT_DEPTH: 1
-  extends:
-    - .kubernetes-env
-    - .test-pr-refs
-  script:
-    - set +e
-    - rg --line-number --hidden --type rust --glob '!{.git,target}' "$ASSERT_REGEX" .; exit_status=$?
-    - if [ $exit_status -eq 0 ]; then
-      echo "$ASSERT_REGEX was found, exiting with 1";
-      exit 1;
-      else
-      echo "No $ASSERT_REGEX was found, exiting with 0";
-      exit 0;
-      fi
-
 check-core-crypto-features:
   stage: check
   extends: