Enable NFR tests to run in an IPv6 enabled environment

Author: shaun-nx

.github/workflows/ci.yml

@@ -301,22 +301,6 @@ jobs:
       image: ${{ matrix.image }}
       k8s-version: ${{ matrix.k8s-version }}
 
-  gke-ipv6-only-tests:
-    name: GKE IPv6 Only Tests
-    needs: [vars, build-oss]
-    strategy:
-      fail-fast: false
-      matrix:
-        image: [nginx]
-        k8s-version:
-          [
-            "${{ needs.vars.outputs.k8s_latest }}",
-          ]
-    uses: ./.github/workflows/gke-ipv6-only.yml
-    with:
-      image: ${{ matrix.image }}
-      k8s-version: ${{ matrix.k8s-version }}
-
   conformance-tests:
     name: Conformance tests
     needs: [vars, build-oss, build-plus]

.github/workflows/gke-ipv6-only.yml

@@ -31,6 +31,11 @@ on:
         default: both
         type: choice
         options: [oss, plus, both]
+      ipv6_enabled:
+        description: Whether to run the tests in an IPv6 enabled environment
+        required: false
+        default: false
+        type: boolean
   schedule:
     - cron: "0 16 1,15 * *" # Run on the 1st and 15th of every month at 16:00 UTC
 
@@ -138,7 +143,7 @@ jobs:
 
       - name: Create GKE cluster
         working-directory: ./tests
-        run: make create-gke-cluster CI=true
+        run: make create-gke-cluster CI=true IPv6_ONLY=${{ needs.vars.outputs.ipv6_enabled }}
 
       - name: Create and setup VM
         working-directory: ./tests