Add Source/Server name to OAI-PMH Harvesting clients

[DS-INRA]

Overview of the Feature Request
As a superuser, I can use a new field to document the source repository in OAI-PMH harvesting clients :

In order to (see related issues) filter content from various harvested repositories with a search facet.

One source/server name should be able to be used for several clients (e.g. to dispatch several sets from the same repository in different dataverse collection).

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

What inspired the request?
Needed for our harvested repositories.

Any open or closed issues related to this feature request?

• Harvesting: Search datasets from specific sources #10195