MDEV-30183	Assertion `!memcmp(rec_trx_id, old_pk_trx_id->data, 6 + 7)' failed in row_log_table_apply_update

- This failure caused by commit 358921ce
row_ins_duplicate_online() should consider if the record is an exact
match of the tuple when number of matching fields equals with number of
unique fields + DB_TRX_ID + DB_ROLL_PTR