feat: Use single kustomization for all alerts

configs/alerts/telegram/alerts-telegram.yaml

@@ -1,19 +0,0 @@
-apiVersion: kustomize.toolkit.fluxcd.io/v1
-kind: Kustomization
-metadata:
-  name: alerts-telegram
-  namespace: flux-system
-spec:
-  interval: 1h
-  retryInterval: 2m
-  timeout: 5m
-  sourceRef:
-    kind: ExternalArtifact
-    name: alerts-telegram
-  decryption:
-    provider: sops
-    secretRef:
-      name: sops-gpg
-  path: ./
-  prune: true
-  wait: true