As discussed in https://gitlab.com/gitlab-org/gitlab/-/merge_requests/111621#note_1291282054, I'm creating this issue to track the work to convert the upload dropzone components created for the Apple App Store and Google Play integrations into a reusable field that can be configured from the Integrations DSL. The existing Apple App Store component can be referenced here: https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/assets/javascripts/integrations/edit/components/sections/apple_app_store.vue