Add runner token expiration interval settings

What does this MR do and why?

This is the first MR of !71607 (closed), as per !71607 (comment 791611312). It adds database settings for the runner token expiration intervals.

Part of #30942 (closed)

.gitlab/ci/docs.gitlab-ci.yml

@@ -77,15 +77,16 @@ ui-docs-links lint:
   script:
     - bundle exec haml-lint -i DocumentationLinks
 
-docs-lint deprecations:
+docs-lint deprecations-and-removals:
   variables:
     SETUP_DB: "false"
   extends:
     - .default-retry
     - .rails-cache
     - .default-before_script
-    - .docs:rules:deprecations
+    - .docs:rules:deprecations-and-removals
   stage: lint
   needs: []
   script:
     - bundle exec rake gitlab:docs:check_deprecations
+    - bundle exec rake gitlab:docs:check_removals