feat: APIs for register mutation no longer return the fee charged for the operation

[happybeing]

The earlier API returned details of the fee paid for register create and mutate and I think this is important for an app.

I suggest the return values for client::registers::register_create() and register_update() should include the fee charged.

[loziniak]

In Client::register_create() fees are returned by using UploadSummary and mechanism mentioned by me in #2329 . See line 357 of registers.rs, function register_create_with_permissions() And when register is updated, perhaps the fees are not taken at all? I recall, that there were informations, that also updates are going to be paid, but maybe it's still the old way, pay once on register creation?