As part of WL#7142 Simplify tablespace discovery during crash recovery,
InnoDB removed code to deal with the MLOG_FILE_CREATE2 redo log record.

The thinking was that external backup tools could parse MLOG_FILE_NAME
records to discover created files. However, MLOG_FILE_NAME usually gets
emitted for something else than file creation, and the MLOG_FILE_CREATE2
record included some flags that are not present in the MLOG_FILE_NAME
records.

So, it seems that we must bring back the record, for the benefit of
external backup tools that parse the redo log.

fil_op_write_log(): Add the parameter "flags" for writing MLOG_FILE_CREATE2.

fil_ibd_create(): Write a MLOG_FILE_CREATE2 record before MLOG_FILE_NAME.

fil_name_parse(): Parse but ignore the MLOG_FILE_CREATE2 record.

RB: 10180
Reviewed-by: Shaohua Wang <shaohua.wang@oracle.com>
Reviewed-by: Debarun Banerjee <debarun.banerjee@oracle.com>