Re-enable support for `@include` on primitive types

Created by: umpox

Currently there is a bug in GraphQL code generator that strips away Array<> when using @include and wrapping a primitive type with Maybe<>. https://github.com/dotansimha/graphql-code-generator/issues/6178

In order to support https://github.com/sourcegraph/sourcegraph/pull/22166, we have disabled @include on the tags field. This has minimal impact on the application, we should re-enable when the bug has been fixed