Merge branch 'ps/refs-wo-the-repository'

In the refs subsystem, implicit reliance of the_repository has been
eliminated; the repository associated with the ref store object is
used instead.

* ps/refs-wo-the-repository:
  refs/reftable: stop using `the_repository`
  refs/packed: stop using `the_repository`
  refs/files: stop using `the_repository`
  refs/files: stop using `the_repository` in `parse_loose_ref_contents()`
  refs: stop using `the_repository`