ref-filter: add info_source to valid_atom

ref-filter: add info_source to valid_atom

Add the source of object data to prevent parsing of unneeded data.
The goal is to improve performance by avoiding calling expensive
functions when we don't need the information they provide
or when we could get it by using a cheaper function.

It is stored in valid_atoms because it depends on the atoms we are
interested in.

Signed-off-by: Olga Telezhnaia <redacted>
Signed-off-by: Junio C Hamano <redacted>