fix(imperative): use chart defaults for SA - stop overriding serviceAccountName

The serviceAccountCreate: false + serviceAccountName: imperative-admin-sa
config consistently results in ArgoCD showing the SA as OutOfSync/Missing
and refusing to create it. This blocks unsealvault-cronjob, which blocks
vault initialization, which blocks the entire deployment.

Use chart defaults: both imperative-sa and imperative-admin-sa get created.
CronJobs run as imperative-sa (chart default). This matches every other
validated pattern (multicloud-gitops, industrial-edge, medical-diagnosis).

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: butler54

values-baremetal.yaml

@@ -413,9 +413,6 @@ clusterGroup:
     # imagePullPolicy is set to always: imperative.imagePullPolicy
     # For additional overrides that apply to the jobs, please refer to
     # https://validatedpatterns.io/imperative-actions/#additional-job-customizations
-    serviceAccountCreate: false
-    adminServiceAccountCreate: true
-    serviceAccountName: imperative-admin-sa
     jobs:
     - name: init-data-gzipper
       playbook: ansible/init-data-gzipper.yaml