LUOsDiagnose: Move legacy behaviour into filter

LUOsDiagnose: Move legacy behaviour into filter

The behaviour of LUOsDiagnose needs special treatment. Commit d22dfef7
changed it to not return hidden, blacklisted or invalid OSes if the
respective field is not requested. This behaviour needs to be preserved
for users of the old opcode, but since it provides an implicit
filtering, it should not be done for LUQuery (the generic way to query
for resources) and is therefore moved from the underlying implementation
to LUOsDiagnose. Users of the new opcode should pass an explicit filter.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>