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>
Merge pull request #1825 from ceph/wip-8380

osd: skip out of order op checks on tiered pools

Reviewed-by: Samuel Just <sam.just@inktank.com>