docs: move docs about remote driver URIs into URI docs

docs: move docs about remote driver URIs into URI docs

The docs about remote URIs in uri.html are somewhat sparse with the full
docs being in remote.html. Move all the URI content from remote.html
into uri.html so the user only needs to look in one place for URI info.

Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>