osd: skip out of order op checks on tiered pools

When we send redirected ops, we do not assign a new tid, which means that
a given client's ops for a pool may not have strictly ordered tids.  Skip
this check if the pool is tiered to avoid false positives.

Fixes: #8380
Signed-off-by: Sage Weil <sage@inktank.com>
(cherry picked from commit cf2b172c843da0599164901956b66c306a59e570)