Fix isNoOLMFeatureGateEnabled to check only the current cluster version

The FeatureGate CR status.featureGates contains entries for each
cluster version. After an upgrade, entries for both the old and new
versions exist. isNoOLMFeatureGateEnabled was iterating all version
entries, so it could incorrectly return true by finding the gate
enabled in a pre-upgrade version's entry, even though the current
version has it disabled. This caused the e2e-upgrade-out-of-change
test to fail because it expected a sail finalizer that the CIO
had already removed during the downgrade path.

Fix this by looking up the current cluster version from ClusterVersion
status.desired.version and only checking the matching featureGates
entry.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: gcs278

test/extended/router/gatewayapicontroller.go

@@ -643,18 +643,28 @@ func isIPv6OrDualStack(oc *exutil.CLI) (bool, error) {
 }
 
 func isNoOLMFeatureGateEnabled(oc *exutil.CLI) (bool, error) {
+	cv, err := oc.AdminConfigClient().ConfigV1().ClusterVersions().Get(context.TODO(), "version", metav1.GetOptions{})
+	if err != nil {
+		return false, fmt.Errorf("failed to get ClusterVersion: %v", err)
+	}
+	currentVersion := cv.Status.Desired.Version
+
 	fgs, err := oc.AdminConfigClient().ConfigV1().FeatureGates().Get(context.TODO(), "cluster", metav1.GetOptions{})
 	if err != nil {
 		return false, fmt.Errorf("failed to get cluster FeatureGates: %v", err)
 	}
 	for _, fg := range fgs.Status.FeatureGates {
+		if fg.Version != currentVersion {
+			continue
+		}
 		for _, enabledFG := range fg.Enabled {
 			if enabledFG.Name == "GatewayAPIWithoutOLM" {
-				e2e.Logf("GatewayAPIWithoutOLM featuregate is enabled")
+				e2e.Logf("GatewayAPIWithoutOLM featuregate is enabled for version %s", currentVersion)
 				return true, nil
 			}
 		}
 	}
+	e2e.Logf("GatewayAPIWithoutOLM featuregate is not enabled for version %s", currentVersion)
 	return false, nil
 }