Add a new API to edit templates metadata

[ChengShi-1]

Overview of the Feature Request an API endpoint to update an existing template, allowing to set empty values (fields that previously had a defined value).

What kind of user is the feature intended for? (Example users roles: API User, Curator, Depositor, Guest, Superuser, Sysadmin)

What inspired the request? SPA Q3 features

What existing behavior do you want changed?

Any brand new behavior do you want to add to Dataverse?

Any open or closed issues related to this feature request?

Are you thinking about creating a pull request for this feature?
Help is always welcome, is this feature something you or your organization plan to implement?