nep-393: add bool return to sbt_revoke_by_owner

[robert-zaremba]

In the reference implementation we return bool in the registry.sbt_revoke_by_owner to signal if the operation should continue or it's finished.

We forgot to push this update to the standard.

This update also makes the API consistent with sbt_recover and sbt_soul_transfer

[render]

Your Render PR Server URL is https://nomicon-pr-510.onrender.com.

Follow its progress at https://dashboard.render.com/static/srv-ck8k2jeru70s73dhrmu0.

[sczembor]

This change enhances the method to maintain consistency with other methods that may run a risk of running out of gas and require repeated execution. Consequently, it eliminates the necessity for an extra view call to verify the completion status of the revocation process.

[KazanderDad]

This change adds a boolean to signal if the operation is finished, which ensures consistency with other methods that may run a risk of running out of gas and require repeated execution. If the result is false then the method should be called again until true is returned. This also eliminates the necessity for an extra view call to verify the completion status of the revocation process.