Remove GraphQL and API deprecations from Deprecations and removals by version

Issue Description

Per our guidelines for deprecations and removals, there is a separate process for GraphQL and REST API docs.

As applicable, the GraphQL and REST API deprecations should be removed from the main deprecations page (Deprecations and removals by version) in data/deprecations and added to the relevant doc instead.

For example, this probably shouldn't be in the deprecations page: https://new.docs.gitlab.com/update/deprecations/#graphql-api-runner-status-will-not-return-paused

Files that are likely misplaced

File In GraphQL/Rest deprecation docs?
14-5-runner-api-status-does-contain-paused.yml Yes and Yes
14-8-graphql-runner-active.yml Yes
15-2-job_age-deprecation.yml Keep, true breaking change, no waiting for REST v5.
15-8-deprecate-disabled-with-override-runner-setting-value.yml Yes
15-9-deprecate-runner-setup-instructions-api.yml Yes
15-9-deprecate-take-schedule-ownership-field.yml Yes
16-0-graphql-RunnerMembershipFilter-renamed.yml Yes
16-2-cirunner_fields.yml Yes and Yes
17-5-deprecate-ciUsedMinutes-graphql-field.yml Yes, and deprecation doc incorrect anyways: ciUsedMinutes != ciMinutesUsed
17-5-deprecate-merge-train-graphql-fields.yml Yes
18-0-graphql-removal.yml Yes

Files that are potentially misplaced

File In GraphQL/Rest deprecation docs?
15-6-deprecate-post-api-v4-runner.yml
15-7-deprecate-api-v4-runner-registration-token-reset-endpoints.yml
16-0-CiRunner-projects-default-sort.yml
17-6-cancel-rest-api-change.yml
17-7-RunnersRegistrationTokenReset-mutation.yml
Edited by Marcel Amirault