Sometimes it is useful to obtain metadata associated with an object
without the need to first download it locally. This is specially useful
when using partial clones.
This change implements the object-info capability that allows clients to
query the remote server for object metadata (currently only size). This
is a backport of the same capability that was recently added to the Git
project a2ba162cda (object-info: support for retrieving object info,
2021-04-20).
Signed-off-by: Bruno Albuquerque <bga@google.com>
Change-Id: I4dc9828e1c247f08b0976b8810be92d124366165