These are not required because MySQL is not
supported anymore

This is part of migration of Folder View to Vue

This makes our authorization calls available to all GraphQL mutations
without the additional step of including the module first.

A new `discussion_id` argument on the `createNote` mutation allows
people to create a note within that discussion.

The ability to lazy-load Discussions has been added, so
GraphQL.object_from_id can treat Discussions the same as AR objects and
batch load them.

https://gitlab.com/gitlab-org/gitlab-ce/issues/62826
https://gitlab.com/gitlab-org/gitlab-ee/issues/9489

https://gitlab.com/gitlab-org/gitlab-ee/issues/9489

https://gitlab.com/gitlab-org/gitlab-ce/issues/62826

- Remove Gitaly call check for fields that have a constant complexity
declared
- Add associated test

- Add 1 for all fields that call Gitaly (with resolvers or without)
- Clarify comment regarding Gitaly call alert
- Expose predicate `calls_gitaly?` instead of ivar

- Add `calls_gitaly: true` to some fields missing (hey, it works!)
- Clarify proc wrapping
- Add kwargs argument to `mount_mutation`

- Move `calls_gitaly_check` to public
- Add instrumentation for flagging missing CallsGitaly declarations
- Wrap resolver proc in before-and-after Gitaly counts to get the net
Gitaly call count for the resolver.