LU-15847 tgt: move tti_ transaction params to tsi_

LU-15847 tgt: move tti_ transaction params to tsi_

Move tti_mult_trans and tti_has_trans to tgt_session_info to
be available in all targets. This allows to cleanup old MDT
duplicating code and can be used for complex transaction
handling in MDT/OFD if needed.

Lustre-change: https://review.whamcloud.com/c/fs/lustre-release/+/47491
Lustre-commit: 0a317b171ebedcba8fc58e548991a884186c350c

Signed-off-by: Mikhail Pershin <mpershin@whamcloud.com>
Change-Id: I3f0c15e283b9e21c04a009f6cf346afa278e7095
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/48979
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>