btr_insert_into_right_sibling(): Inherit any gap lock from the
left sibling to the right sibling before inserting the record
to the right sibling and updating the node pointer(s).

lock_update_node_pointer(): Update locks in case a node pointer
will move.

Based on mysql/mysql-server@c7d93c274fdc5c56e36458fa4000fa3a483ffffd