Update CLI to new authenticator options format

We're using a per-key format now, so switch from
  --authenticator-options=blob
to
  --authenticator-option=key=value

In both remote-modify and remote-add
This commit is contained in:
Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f