Display a sample command when creating API token

[mderynck]

On the Grafana OnCall->Settings page when you create a new API token it would be nice if it also displayed an example curl command to make use of the token for testing instead of needing to lookup in the docs. This would match the behavior that Grafana has when you create an API key in its settings page.

[Konstantinov-Innokentii]

Good idea, we have /info endpoint in public api. But I am wondering which url wi should use, BASE_URL from settings I guess?

[Matvey-Kuk]

We added this task to the core team's backlog.

[raphael-batte]

Some concept