woodpecker: add autobackup-operator CI ServiceAccount

The autobackup-operator Woodpecker pipeline needs a dedicated
ServiceAccount to run its CI jobs under, mirroring the existing
per-project operator CI SAs in the woodpecker namespace.

- Add serviceaccount_autobackup_operator_ci.yaml (SA autobackup-operator-ci
  in the woodpecker namespace)
- Register it in the woodpecker kustomization.yaml resources list

apps/base/woodpecker/kustomization.yaml

@@ -7,6 +7,7 @@ resources:
   - cnpg_cluster.yaml
   - cnpg_backup.yaml
   - cnpg_pooler.yaml
+  - serviceaccount_autobackup_operator_ci.yaml
   - serviceaccount_kea_operator_ci.yaml
   - serviceaccount_jellyfin_ha_src.yaml
   - serviceaccount_terraform_artifactapi.yaml

apps/base/woodpecker/serviceaccount_autobackup_operator_ci.yaml

@@ -0,0 +1,6 @@
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: autobackup-operator-ci
+  namespace: woodpecker