Add metadata to verify api docs

Adds metadata for all api docs related to
Verify - Continuous Integration or Testing

doc/api/instance_level_ci_variables.md

+---
+stage: Verify
+group: Continuous Integration
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
+---
+
 # Instance-level CI/CD variables API
 
 > - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/14108) in GitLab 13.0

doc/api/jobs.md

+---
+stage: Verify
+group: Continuous Integration
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
+---
+
 # Jobs API
 
 ## List project jobs

doc/api/lint.md

+---
+stage: Verify
+group: Continuous Integration
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
+---
+
 # Validate the `.gitlab-ci.yml` (API)
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/5953) in GitLab 8.12.

doc/api/pipeline_schedules.md

+---
+stage: Verify
+group: Continuous Integration
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
+---
+
 # Pipeline schedules API
 
 You can read more about [pipeline schedules](../ci/pipelines/schedules.md).

doc/api/pipeline_triggers.md

+---
+stage: Verify
+group: Continuous Integration
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
+---
+
 # Pipeline triggers API
 
 You can read more about [triggering pipelines through the API](../ci/triggers/README.md).

doc/api/pipelines.md

+---
+stage: Verify
+group: Continuous Integration
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
+---
+
 # Pipelines API
 
 ## Single Pipeline Requests

doc/api/project_level_variables.md

 ---
-stage: Create
-group: Source Code
-info: "To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers"
+stage: Verify
+group: Continuous Integration
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
 type: reference, api
 ---
 

doc/api/templates/gitlab_ci_ymls.md

 ---
+stage: Verify
+group: Continuous Integration
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
 type: reference
 ---
 
@@ -8,9 +11,9 @@ In GitLab, there is an API endpoint available to work with GitLab CI/CD YMLs. Fo
 information on CI/CD pipeline configuration in GitLab, see the
 [configuration reference documentation](../../ci/yaml/README.md).
 
-## List GitLab CI YML templates
+## List GitLab CI YAML templates
 
-Get all GitLab CI/CD YML templates.
+Get all GitLab CI/CD YAML templates.
 
 ```plaintext
 GET /templates/gitlab_ci_ymls
@@ -19,7 +22,7 @@ GET /templates/gitlab_ci_ymls
 Example request:
 
 ```shell
-curl https://gitlab.example.com/api/v4/templates/gitlab_ci_ymls
+curl "https://gitlab.example.com/api/v4/templates/gitlab_ci_ymls"
 ```
 
 Example response:
@@ -109,9 +112,9 @@ Example response:
 ]
 ```
 
-## Single GitLab CI YML template
+## Single GitLab CI YAML template
 
-Get a single GitLab CI/CD YML template.
+Get a single GitLab CI/CD YAML template.
 
 ```plaintext
 GET /templates/gitlab_ci_ymls/:key
@@ -119,12 +122,12 @@ GET /templates/gitlab_ci_ymls/:key
 
 | Attribute  | Type   | Required | Description                           |
 | ---------- | ------ | -------- | ------------------------------------- |
-| `key`      | string | yes      | The key of the GitLab CI/CD YML template |
+| `key`      | string | yes      | The key of the GitLab CI/CD YAML template |
 
 Example request:
 
 ```shell
-curl https://gitlab.example.com/api/v4/templates/gitlab_ci_ymls/Ruby
+curl "https://gitlab.example.com/api/v4/templates/gitlab_ci_ymls/Ruby"
 ```
 
 Example response:

doc/api/visual_review_discussions.md

 ---
-stage: Create
-group: Source Code
-info: "To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers"
+stage: Verify
+group: Testing
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
 type: reference, api
 ---