fix(common): correct skipEmptyWalArchiveCheck template syntax in cluster (#37317)

Updated the _cluster.tpl file to ensure the skipEmptyWalArchiveCheck
annotation is properly rendered. Added a new test case in
cluster_metadata_test.yaml to verify the correct behavior of the
annotation.

**Description**
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⚒️ Fixes  # <!--(issue)-->

**⚙️ Type of change**

- [ ] ⚙️ Feature/App addition
- [x] 🪛 Bugfix
- [ ] ⚠️ Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] 🔃 Refactor of current code
- [ ] 📜 Documentation Changes

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Added unit tests to verify the annotation

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**✔️ Checklist:**

- [x] ⚖️ My code follows the style guidelines of this project
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- [ ] 📄 I have made changes to the documentation
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charts/library/common-test/tests/cnpg/cluster_metadata_test.yaml

@@ -153,3 +153,17 @@ tests:
         equal:
           path: metadata.namespace
           value: local-namespace
+
+  - it: should pass with cnpg with skipEmptyWalArchiveCheck annotation
+    set:
+      cnpg:
+        my-pg:
+          enabled: true
+          user: test-user
+          database: test-db
+          password: test-password
+    asserts:
+      - documentIndex: *clusterDoc
+        equal:
+          path: metadata.annotations["cnpg.io/skipEmptyWalArchiveCheck"]
+          value: "enabled"

charts/library/common/Chart.yaml

@@ -48,5 +48,5 @@ sources:
   - https://hub.docker.com/_/
   - https://hub.docker.com/r/mikefarah/yq
 type: library
-version: 28.12.8
+version: 28.12.9
 

charts/library/common/templates/class/cnpg/_cluster.tpl

@@ -176,7 +176,9 @@ metadata:
   annotations:
     cnpg.io/hibernation: {{ $hibernation | quote }}
     checksum/secrets: {{ toJson $rootCtx.Values.secret | sha256sum }}
-    cnpg.io/skipEmptyWalArchiveCheck: $skipEmptyWalArchiveCheck
+    {{- if $skipEmptyWalArchiveCheck }}
+    cnpg.io/skipEmptyWalArchiveCheck: "enabled"
+    {{- end }}
   {{- $annotations := (mustMerge $clusterAnnotations (include "tc.v1.common.lib.metadata.allAnnotations" $rootCtx | fromYaml)) -}}
   {{- with (include "tc.v1.common.lib.metadata.render" (dict "rootCtx" $rootCtx "annotations" $annotations) | trim) }}
     {{- . | nindent 4 }}