Right now the map<endpoint, config> sits on the sstables manager and its
update is governed by database (because it's peering and can kick other
shards to update it as well).
Having the sharded<storage_manager> at hand lets freeing database from
the need to update configs and keeps sstables_manager a bit smaller.
Also this will allow keeping s3 clients shared between sstables via this
map by next patch.
Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
a59096aa70