PG::PriorSet: consider lost osds in up_now for pcontdec

Otherwise, the pg will remain down even as osds are marked lost.

Signed-off-by: Samuel Just <sam.just@inktank.com>
ReplicatedPG::share_pg_log: update missing_loc

Signed-off-by: Samuel Just <sam.just@inktank.com>
pg_missing_g::add_next_event: got missing on lost_revert

Signed-off-by: Samuel Just <sam.just@inktank.com>
RepilcatedPG: handle ec pools in mark_all_unfound_lost

Fixes: #7439
Signed-off-by: Samuel Just <sam.just@inktank.com>
ReplicatedPG::prepare_pull: adjust v if most recent entry is lost_revert

Signed-off-by: Samuel Just <sam.just@inktank.com>