Upgrade Argo CD Helm chart to latest (9.4.3) and set admin credentials via chart values

[rowan-stein]

User Request

Upgrade argo-cd Helm chart to the latest version and fix admin credentials via chart values. Ensure admin login works locally.

Specification (Research)

• Target chart: argo-helm/argo-cd v9.4.3 (appVersion: Argo CD v3.3.1)
• Keep admin enabled via ConfigMap data:
  • configs.cm.admin.enabled: true
• Set admin credentials via Secret values:
  • configs.secret.argocdServerAdminPassword: "$2a$ bcrypt hash for 'admin'"
  • configs.secret.argocdServerAdminPasswordMtime: RFC3339 timestamp (bump on rotation)
• After apply, verify admin login:
  • REST: port-forward svc/argocd-server 8080:443; POST /api/v1/session
  • CLI: use argocd v3.3.1 to match server; flags: --insecure --grpc-web when port-forwarding
• Notes:
  • Names (deploy/svc) may differ by release; prefer label selectors if scripting.
  • Major upgrade from v2.7.x → v3.3.x; follow rollout after secret update.

Acceptance Criteria

• Terraform helm_release updated to chart 9.4.3.
• Admin enabled and password set via chart values ($2a$ bcrypt for "admin" + mtime).
• Local verification: REST returns token; CLI v3.3.1 login succeeds with --grpc-web --insecure.
• Short README/dev note added on CLI version pin for local verification.