Filter GraphQL results by Current.organization

We need to filter GraphQL by the current Organization isolation context.

Proposal:

• We should filter returns results similar to authorize :read_project in ProjectType where we only select results within the current Organization. Initially we should focus on:
  • Project Type
  • Group/Namespace Type
  • User Type
• Add the current Organization to the GraphQL context in app/controllers/graphql_controller.rb. This will allow gradual improvement of queries to scope by the current Organization.
• Add the current Organization to the GraphQL context in app/channels/graphql_channel.rb