test(kafka): watch PVC deletion in the release-1.6 E2E suite

Replace negative Chainsaw assertions with deletion watches, keeping the
two-minute timeout and the preceding Bound assertions for both PVCs.

Chainsaw 0.2.15 can abort polling on an API read error and report its
previous "resource matches expectation" instead. The failed #4402 run
ended this check after 4.5 seconds, not its two-minute budget.

Verified with Chainsaw 0.2.15 and kubectl 1.33.13 against a loopback API:
delayed deletion, already absent, a read failure on the old polling path,
and watch reconnect succeed; retained PVCs and forbidden reads fail.
Chainsaw lint passes. The original CI API error was not preserved; a
full E2E rerun is still needed.

Signed-off-by: Yan Bondarenko <202671653+yankawai@users.noreply.github.com>

hack/e2e-chainsaw/kafka/chainsaw-test.yaml

@@ -2,8 +2,9 @@
 #
 # The final step replaces the BATS check that Strimzi reclaims the ZooKeeper
 # PVCs on delete: instead of a manual kubectl delete, an explicit delete of the
-# Kafka CR followed by `error` ops asserts both PVCs disappear (a regression in
-# the operator's deleteClaim handling would leave them behind).
+# Kafka CR followed by deletion watches asserts both PVCs disappear (a
+# regression in the operator's deleteClaim handling would leave them behind).
+# The Bound assertions below ensure both PVCs existed before deletion.
 apiVersion: chainsaw.kyverno.io/v1alpha1
 kind: Test
 metadata:
@@ -99,17 +100,17 @@ spec:
           apiVersion: apps.cozystack.io/v1alpha1
           kind: Kafka
           name: test
-    - error:
+    - wait:
         timeout: 2m
-        resource:
-          apiVersion: v1
-          kind: PersistentVolumeClaim
-          metadata:
-            name: data-kafka-test-zookeeper-0
-    - error:
+        apiVersion: v1
+        kind: PersistentVolumeClaim
+        name: data-kafka-test-zookeeper-0
+        for:
+          deletion: {}
+    - wait:
         timeout: 2m
-        resource:
-          apiVersion: v1
-          kind: PersistentVolumeClaim
-          metadata:
-            name: data-kafka-test-zookeeper-1
+        apiVersion: v1
+        kind: PersistentVolumeClaim
+        name: data-kafka-test-zookeeper-1
+        for:
+          deletion: {}