Actions Runner rest api (#33873)

Implements runner apis based on
https://docs.github.com/en/rest/actions/self-hosted-runners?apiVersion=2022-11-28#list-self-hosted-runners-for-an-organization

- Add Post endpoints for registration-token, google/go-github revealed
this as problem
  - We should deprecate Get Endpoints, leaving them for compatibility
- Get endpoint of admin has api path /admin/runners/registration-token
that feels wrong, /admin/actions/runners/registration-token seems more
consistent with user/org/repo api
- Get Runner Api
- List Runner Api
- Delete Runner Api

- Tests admin / user / org / repo level endpoints

Related to #33750 (implements point 1 and 2)
Via needs discovered in #32461, this runner api is needed to allow
cleanup of runners that are deallocated without user interaction.

---------

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

models/fixtures/action_runner.yml

@@ -0,0 +1,40 @@
+-
+  id: 34346
+  name: runner_to_be_deleted-user
+  uuid: 3EF231BD-FBB7-4E4B-9602-E6F28363EF18
+  token_hash: 3EF231BD-FBB7-4E4B-9602-E6F28363EF18
+  version: "1.0.0"
+  owner_id: 1
+  repo_id: 0
+  description: "This runner is going to be deleted"
+  agent_labels: '["runner_to_be_deleted","linux"]'
+-
+  id: 34347
+  name: runner_to_be_deleted-org
+  uuid: 3EF231BD-FBB7-4E4B-9602-E6F28363EF19
+  token_hash: 3EF231BD-FBB7-4E4B-9602-E6F28363EF19
+  version: "1.0.0"
+  owner_id: 3
+  repo_id: 0
+  description: "This runner is going to be deleted"
+  agent_labels: '["runner_to_be_deleted","linux"]'
+-
+  id: 34348
+  name: runner_to_be_deleted-repo1
+  uuid: 3EF231BD-FBB7-4E4B-9602-E6F28363EF20
+  token_hash: 3EF231BD-FBB7-4E4B-9602-E6F28363EF20
+  version: "1.0.0"
+  owner_id: 0
+  repo_id: 1
+  description: "This runner is going to be deleted"
+  agent_labels: '["runner_to_be_deleted","linux"]'
+-
+  id: 34349
+  name: runner_to_be_deleted
+  uuid: 3EF231BD-FBB7-4E4B-9602-E6F28363EF17
+  token_hash: 3EF231BD-FBB7-4E4B-9602-E6F28363EF17
+  version: "1.0.0"
+  owner_id: 0
+  repo_id: 0
+  description: "This runner is going to be deleted"
+  agent_labels: '["runner_to_be_deleted","linux"]'