Add spec for all release API - GET, POST, PUT, DELETE.
Also, fixes some minior bugs.

This suggests possibly related issues when the user types a title.

This uses GraphQL to allow the frontend to request the exact
data that is requires. We also get free caching through the Vue Apollo
plugin.

With this we can include the ability to import .graphql files in JS
and Vue files.
Also we now have the Vue test utils library to make testing
Vue components easier.

Closes #22071

See Danger's suggestions:
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/6869#note_93730253