feature: support filtering by workspace provider when listing environ…

[fuskovic]

What this does?

Adds the --provider flag to both the coder envs ls command as well as the coder resources top command.

envs command

Now supports the --provider flag so users can filter environments by a particular workspace provider name.

resource manager command

Now supports the --provider flag so users can aggregate resource amounts by a particular workspace provider name.

[shortcut-integration]

This pull request has been linked to Clubhouse Story #7505: As an admin, I want to be able to filter workspaces by the workspace provider they're using so that I can easily find and delete them and remove my workspace provider quickly.

[cmoog]

So I'm having second thoughts about this design. In all other cases coder envs ls only lists environments owned by the active user. I think this functionality should be rolled under the coder resources subcommand where the use case more closely matches.

[cmoog]

great stuff. looks good to go