🐛 [BUG] - Alerts Plugin regenerates CA on every diff

[IvoGoman]

Priority

(Medium) I'm annoyed but I'll live

Description

The diff for the alerts plugin shows a diff for the ccloud-monitoring-ca and ccloud-ca-bundle on every reconciliation.

"Secret/ccloud-ca-bundle: [\n {\n \"value\": \"***** - after\",\n \"op\": \"replace\",\n \"path\": \"/data/ca.crt\"\n }\n],Secret/ccloud-monitoring-ca: [\n {\n \"value\": {\n \"apiVersion\": \"v1\",\n \"data\": {\n \"tls.crt\": \"*****\",\n \"tls.key\": \"*****\"\n },\n \"kind\": \"Secret\",\n \"metadata\": {\n \"annotations\": {\n \"helm.sh/hook\": \"pre-install, pre-upgrade\"\n },\n \"labels\": {\n \"app.kubernetes.io/managed-by\": \"Helm\",\n \"plugin\": \"alerts-ccloud\",\n \"plugindefinition\": \"alerts\",\n \"release\": \"alerts-ccloud\"\n },\n \"name\": \"ccloud-monitoring-ca\",\n \"namespace\": \"ccloud\"\n },\n \"type\": \"Opaque\"\n },\n \"op\": \"add\",\n \"path\": \"\"\n }\n]"}

The ccloud-monitoring-ca should not be regenerated on every deploy, but the condition does not work:
https://github.com/cloudoperators/greenhouse-extensions/blob/main/alerts/charts/templates/ca-secret-issuer-cert.yaml#L2

This causes reoccurring helm upgrades which eventually lead to the release stuck in pending.

Reproduction steps

1. Go to the organisation namespace 
2. `helm history alerts`
3. see frequent upgrades of the plugin

5239    	Tue Dec 10 17:43:41 2024	superseded	alerts-0.15.3	           	2.3.3
5240    	Tue Dec 10 17:44:49 2024	superseded	alerts-0.15.3	           	2.3.3
5241    	Tue Dec 10 17:45:55 2024	superseded	alerts-0.15.3	           	2.3.3
5242    	Tue Dec 10 17:47:02 2024	superseded	alerts-0.15.3	           	2.3.3
5243    	Tue Dec 10 17:48:08 2024	deployed  	alerts-0.15.3	           	2.3.3

### Screenshots

```bash
![DESCRIPTION](LINK.png)