It's the manager that knows about storages and it should init/destroy
it. Also the "upload" and "staging" paths are about to be hidden in
sstables/ code, this code move also facilitates that.
The indentation in storage.cc is deliberately broken to make next patch
look nicer (spoiler: it won't have to shift those lines right).
Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
11b704e8b8