Add terraform-enc woodpecker ServiceAccount

The new terragrunt-enc repo's Woodpecker CI authenticates to Vault via
kubernetes auth, which binds to a ServiceAccount in the woodpecker namespace.

- Add apps/base/woodpecker/serviceaccount_terraform_enc.yaml.
- Register it in the woodpecker kustomization.

apps/base/woodpecker/kustomization.yaml

@@ -8,6 +8,7 @@ resources:
   - cnpg_pooler.yaml
   - serviceaccount_terraform_artifactapi.yaml
   - serviceaccount_terraform_authentik.yaml
+  - serviceaccount_terraform_enc.yaml
   - serviceaccount_terraform_git.yaml
   - serviceaccount_terraform_prowlarr.yaml
   - serviceaccount_terraform_rancher.yaml

apps/base/woodpecker/serviceaccount_terraform_enc.yaml

@@ -0,0 +1,6 @@
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: terraform-enc
+  namespace: woodpecker