Validator set new commission fee

[ebruoguzberk]

Description: Multiple validators would like to change the commission fees because they have new customers and new commission fees set. Some validators have a lot of nodes, and these nodes are supporting skale chains, so no Exit is possible here to reregister with a new validator.

Main Solution: Ability to change commission fee.

Alternative : Be able to move nodes from one validator to another by link/unlink node.
It would be great at least if they could move a node from one validator to another to change the commission fee.