Prop 135: Disable conversion for previously registered USK

Author
Evmos DAO (Twitter: @EvmosDAO, TG: DAO News)

## Reasoning
The interpretation of the origin denomination on Evmos changed from "factory/kujira1qk00h5atutpsv900x202pxx42npjr9thg58dnqpa72f2p7m2luase444a7/uusk" to "factory:kujira1qk00h5atutpsv900x202pxx42npjr9thg58dnqpa72f2p7m2luase444a7:uusk". This generates a different IBC denomination and makes the current registered contract for USK obsolete.

## Risks
No risks. There aren't any converted USK on the EVM. Check it out yourself 0x13974cf36984216C90D1F4FC815C156092feA396