Change is adjusting BeginObjectNextVersion to create pending object in
`pending_objects` or `objects` table depends on configuration. This is
first change to move pending objects from objects table.
General goal is to support both tables until `objects` table will be
free from pending objects. Whenever it will be needed code will be
supporting both tables at once.
To be able to decide if we need to use `pending_objects` table or
`objects` table we extend satellite stream id to keep that information
for later use.
BeginObjectExactVersion will be not adjusted because at the moment it's
used only in tests.
Part of https://github.com/storj/storj/issues/6046
Change-Id: Ibf21965f63cca5e1775469994a29f1fd1261af4e
cebf255d64