fix(myorg-assistant): fix CronJob image references to use Gitea registry image

CronJobs were referencing 'myorg-assistant:latest' (a local image that
doesn't exist in the cluster), causing ImagePullBackOff on all 4 active
CronJob pods. Updated all 5 CronJob manifests to use the same image as
the Deployment (git.rogi.casa/roger/myorg-assistant/myorg-assistant:fcf79bf)
and added imagePullSecrets: gitea-registry for authentication.

argocd/argocd-rbac-cm.yaml

@@ -1,15 +0,0 @@
-apiVersion: v1
-kind: ConfigMap
-metadata:
-  name: argocd-rbac-cm
-  namespace: argocd
-  labels:
-    app.kubernetes.io/name: argocd-rbac-cm
-    app.kubernetes.io/part-of: argocd
-data:
-  policy.default: ""
-  policy.csv: |
-    p, role:platform-engineer, applications, get, */*, allow
-    p, role:platform-engineer, applications, sync, */*, allow
-    p, role:platform-engineer, projects, get, *, allow
-    g, platform-engineer, role:platform-engineer