[VS Code] Hide SAST Scanning when there is no account

User problem to solve

As a VSCode user, SAST scanning should be hidden when I don't have GitLab account authenticated because scanning will fail immediately without an account.
Current image.png
Expected image.png

Proposal

  1. Hide the command from command palette
  2. Hide the SAST Scan panel in the sidebar
  3. Disable scan on file save
Edited by Juhee Lee