Lock the connectivity command

.github/workflows/dont-modify-connectivity.yaml

@@ -0,0 +1,24 @@
+name: Don't modify the connectivity command
+
+on:
+  pull_request: {}
+
+jobs:
+  check_changes:
+    name: Fail if the connectivity command is getting modified
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Check if the connectivity command is getting modified
+        uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36 # v3.0.2
+        id: check
+        with:
+          filters: |
+            connectivity:
+              - 'connectivity/**'
+              - 'cli/connectivity.go'
+
+      - name: Fail if the connectivity command is getting modified
+        if: steps.check.outputs.connectivity == 'true'
+        run: |
+          echo "Don't modify the connectivity command. @michi-covalent is holding a lock."
+          exit 1

connectivity/suite.go

@@ -1,6 +1,9 @@
 // SPDX-License-Identifier: Apache-2.0
 // Copyright Authors of Cilium
 
+// Package connectivity defines tests executed by the "cilium connectivity test"
+// command. Do not modify this package. It's being moved to cilium/cilium repo as
+// a part of https://github.com/cilium/design-cfps/pull/9.
 package connectivity
 
 import (