Allow cross region shares with a feature flag

[voidwisp]

Currently data.all does not allow to set up shares cross region. I was told this was not enabled because LakeFormation did not allow cross region shares but now it does. I propose that this becomes a setting in config.json to enable this feature as an option. It should also be tested if it works with access points, s3 buckets, lakeformation and upcoming redshift support.