Storage Driver related endpoint changes.

[g-saracca]

Overview of the Feature Request

1. Move Get Dataverse Storage Driver endpoint outside /admin path (/api/admin/dataverse/[dv-alias]/storageDriver?getEffective=true).
2. Move Get All Storage Drivers endpoint oustide /admin path (/api/admin/dataverse/storageDrivers). We also need to standardise the response format of this endpoint to match the same structure returned from Get Dataverse Storage Driver above, e.g:

{
    name: 'foo',
    type: 's3',
    label: 'Foo',
}

What kind of user is the feature intended for?
API User (super users)

What inspired the request?
SPA Roadmap.
We need to show the current storage driver of a collection and also let super users be able to select the storage driver from a list of available storage drivers.

[ekraffmiller]

implemented in #11716