Review calls requires root origins and determine if we can reduce the requirement

[xlc]

Right now many calls requires root origin such as register.swap.

Due to design of OpenGov that root track can only have one referendum at a time. This means it is not possible to have two independent referenda from two parachain teams.

It makes perfect sense to have multiple concurrent register.swap proposal, as parachain leases are done in a batch. So we should make the admin origin for register pallet configurable and adjust OpenGov track accordingly.

While we are at it, we might as well review other calls that require root origin and determine if it is necessary.

[xlc]

Another low damage but critical operational call is disputes.force_unfreeze. For such low damage calls, they don't need the protection of root origin and we should be able to dispatch them faster.

[olanod]

I asked this a while back, I would even go as far as deprecating ensure_root and always be explicit with specialized origins.