public port sharing not available on OSS deployment

[f0ssel]

From #11486 (comment)

@kylecarbs the feature allows admins to restrict the maximum sharing level of ports in the template settings. If you're on our dev template the maximum sharing level is Authenticated.

We could add a tooltip if this is unclear.

@stirby What do you mean by "If you're on our dev template"?

I'm on an OSS deployment, upgraded from v2.10.2 to v2.11.0 today, and am seeing the same thing as @kylecarbs: "public" option is greyed out.

In the workspace settings, the "Public" option is pre-selected and unmodifiable, as expected.

The documentation on port forwarding says:

OSS deployments allow all workspaces to share ports at both the authenticated and public levels.

I can't seem to find a way to enable public port sharing via the port helper.

I've started a OSS deployment and I see the issue described:

[stirby]

A community member reported this issue in discord, they were on an OSS deployment as well.