LU-14692 osp: deprecate IDIF sequence for MDT0000

LU-14692 osp: deprecate IDIF sequence for MDT0000

Always return true for IDIF seq osp_fid_end_seq
so osp precreate will rollover to a new seq in
the FID_SEQ_NORMAL range for MDT0000.

Remove conf-sanity test_122b:
Check OST sequence wouldn't change when IDIF 32bit overflows

Change-Id: I85a0e38266331c96d971d68ec353949ccac3fc21
Signed-off-by: Li Dongyang <dongyangli@ddn.com>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/45822
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Sergey Cheremencev <scherementsev@ddn.com>