make IterateChildren and RunObserveChildren identical to
make IterateChildren and RunObserveChildren identical to

... IterateChildrenV2 and RunObserveChildrenV2, so we can replace
V2 versions in all go components code and then remove the V2 versions
from metakv code

Change-Id: Id2786d0c32b3d6ba302d2697474bcbba516e8346
Reviewed-on: https://review.couchbase.org/c/cbauth/+/168097
Well-Formed: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Tested-by: Artem Stemkovski <15a0730a27c69f62ab86f2b6c639fca202166c02@couchbase.com>
Reviewed-by: Abhijeeth Nuthan <c984f83ff185d65ff5101a0e4554989c5828e94c@couchbase.com>

couchbase/cbauth,couchbase/cbauth