Adding new `AddAwardEmoji`, `RemoveAwardEmoji` and `ToggleAwardEmoji`
GraphQL mutations.
Adding new `#authorized_find_with_pre_checks!` and (unused, but for
completeness `#authorized_find_with_post_checks!`) authorization
methods. These allow us to perform an authorized find, and run our own
additional checks before or after the authorization runs.
https://gitlab.com/gitlab-org/gitlab-ce/issues/62826
Since the `GraphQL::ID_TYPE` usages should represent globally unique
ids, this changes some fields for which this is not the case into
strings.
The `ID_TYPE` is a specialised, so this change should be backwards
compatible.
https://graphql-ruby.org/type_definitions/scalars.html
