Display job metadata in CICD admin pages

What does this MR do and why?

Introduce read_build_metadata ability to grant users minimal read access to a build's information.

This ability can be granted to users to allow them to see minimal information about a build (e.g. duration, finished_at, id, etc.) even without membership to the build's project (membership grants read_build ability).

read_build_metadata is currently enabled for a user when any of the following conditions are met:

• user can read_build
• user can read_admin_cicd - purpose: in admin area, the user will be able to see minimal information of a build (of a project the user is not a member of)

References

• Adjust views so that only allowed components an... (#525077 - closed)
• Display group, project, pipeline, build, commit... (#521119 - closed)
• read_admin_cicd: Hide projects assigned to proj... (#517905 - closed)

Screenshots or screen recordings

Page	User: Admin	User: Non-admin w/ read_admin_cicd custom admin role
Admin Jobs page	Note: Pointed elements are links	Note: Pointed elements are plain text
Admin runner details page

How to set up and validate locally

1. Enable feature flag

   $ rails c
   > Feature.enable(:custom_admin_roles)

2. Create a new admin member role with read_admin_cicd permission enabled

   > admin_member_role = MemberRole.create(name: 'Test', description: 'Test', read_admin_cicd: true)

3. Assign the new admin role to a non-admin user

   > user = User.find(<a_user_id>)
   > Users::UserMemberRole.create(member_role: admin_member_role, user: user)`

4. Login with the user

5. Click global search in left sidebar ("Search or go to"). Click "Admin area" menu item.

6. In /admin/jobs page, find a job for a project the current user is not a member of

   Or, create one with the following commands in Rails console:

   > p = FactoryBot.create(:project, namespace: FactoryBot.create(:namespace, name: 'unique namespace name laksjdf'))
   > > FactoryBot.create(:ci_build, :success, project: p)

7. Verify that the status, ref, and commit values are displayed as plain text instead of links

   Click to expand

   

8. Click on the job's runner to visit the runner details page. Click on Jobs tab then verify that the status, job, project, and commit columns values are displayed as plain text instead of links

   Click to expand

   

MR acceptance checklist

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