For ROW_FORMAT=DYNAMIC and ROW_FORMAT=COMPACT records, we have to
identify whether the record contains more columns than when the
clustered index tree was originally created. In this case, the
number of fields
(FIXME: number_of_added_fields-1, not the total number of fields)
needs to be written to the record header.

rec_comp_status_t: An enum of the status bit values.

rec_leaf_format: An enum that replaces the bool parameter of
rec_init_offsets_comp_ordinary().

rec_get_converted_size_comp(): Do not support infimum,supremum.
They are never supposed to be stored in dtuple_t, as page creation
nowadays uses a lower-level method for inserting them.

innobase_add_instant_try(): Initialize the dtuple_t::info_bits
appropriately to REC_INFO_MIN_REC_FLAG | REC_STATUS_COLUMNS_ADDED
so that it can be inserted into a ROW_FORMAT!=REDUNDANT table.