jbd2: replace journal state flag by checking errseq

Now JBD2 detects metadata writeback error of fs dev according to errseq.
Replace journal state flag by checking errseq.

Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Suggested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20231213013224.2100050-3-chengzhihao1@huawei.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>