feat: add call identity.change_owner_key()

SECURITY: this implies to add a new field revocation_key: AccountId in IdtyValue struct, to allow the explicit revocation from the old owner key.

changed milestone to %ğtest migration

added C-runtime D-hard P5-sometimesoon labels

assigned to @librelois

changed title from feat: add call identity.change_owner_key to feat: add call {++}identity.change_owner_key{+()+}

changed title from feat: add call {--}identity.change_owner_key(){--} to feat: add call identity.change_owner_key()

Implemented in !86 (merged)

closed

removed P5-sometimesoon label