fix(e2e): hardcode ubuntu-latest for e2e-kind, fix go-version, add local run docs

Author: syscod3

.github/workflows/ci.yml

@@ -108,14 +108,14 @@ jobs:
 
   e2e-kind:
     name: E2E (Kind)
-    runs-on: ${{ vars.E2E_RUNNER_LABEL || 'ubuntu-latest' }}
+    runs-on: ubuntu-latest
     needs: [lint, build]
     steps:
       - uses: actions/checkout@v4
 
       - uses: actions/setup-go@v5
         with:
-          go-version-file: go.mod
+          go-version: ${{ env.GO_VERSION }}
 
       - uses: helm/kind-action@v1
         with:

test/e2e/e2e_suite_test.go

@@ -35,6 +35,13 @@ const (
 	helmCRDRelease = "imp-crds"
 )
 
+// Note: the Kind cluster itself is managed by the CI workflow (helm/kind-action@v1) or
+// must be created manually before running these tests locally:
+//
+//	kind create cluster --name imp-e2e
+//	go test -tags e2e ./test/e2e/... -v -timeout 15m
+//	kind delete cluster --name imp-e2e
+
 var _ = BeforeSuite(func() {
 	By("creating namespace")
 	nsCmd := exec.Command("kubectl", "create", "ns", namespace)