GitOps (implemented in Argo CD) improvement

[LinuxSuRen]

We only provided the basic function of the Argo CD to implement the GitOps feature. Those features are planned:

• Support to set Helm parameters of an Application #694
• Support to set Kustomization parameters of an Application #695
• Support to edit the Argo CD application via UI (see Support to edit the CD configuration in graphic mode #608)
• Support updating the images of Applications automatically (see [GitOps] Support to update workloads automatically #687)
  • See also the document

There are some potential small features:

• Support to show and toggle annotation of the CD application #696
  • For example, the annotations belong to argocd

Annotations are used:

• argocd-image-updater.argoproj.io/git-branch: main
• argocd-image-updater.argoproj.io/git-branch: base:target
• argocd-image-updater.argoproj.io/write-back-method: git:secret:argocd-image-updater/git-creds
• argocd-image-updater.argoproj.io/write-back-method: git
• argocd-image-updater.argoproj.io/write-back-target: kustomization
• argocd-image-updater.argoproj.io/<image>.update-strategy: semver
• argocd-image-updater.argoproj.io/myimage.allow-tags: regexp:^[0-9a-f]{7}$
• argocd-image-updater.argoproj.io/api.pull-secret: pullsecret:argocd/osf2f-ghcr

There are some potential issues that we might need to resolve:

• Adding an option to support reading global secrets in argo-image-updater argoproj/argo-helm#1353

/kind feature

[chengleqi]

Maybe we can refer to this #740 Proposal when fixing issue such as #694 and #695 .