Admin Token API: Identify Pipeline trigger tokens

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What does this MR do and why?

This MR adds support for identifying pipeline trigger tokens to the Admin Token API.

🛠️ with ❤️ at Siemens

References

• Issue: #506554 (closed)
• Epic: &15777
• Docs: https://docs.gitlab.com/ee/api/admin/token.html

MR acceptance checklist

MR Checklist ( @nwittstruck)

• Changelog entry added, if necessary
• Documentation created/updated via this MR
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Tested in all supported browsers
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the javascript style guides
• Conforms to the database guides

How to set up and validate locally

1. Enable feature flag via rails c:

Feature.enable(:admin_agnostic_token_finder)

2. You'll need to create a personal access token to access the token and the runner authentication token that you'd like to query:
   1. Create a personal access token with admin_mode and api capabilities. Preferences > Access Tokens > Add a new token
   2. Create a new pipeline trigger token to query. Project > Settings > CI / CD > Pipeline trigger tokens > Add new token
3. Now you can retrieve information about this token:

curl -k --request POST \
--url 'https://gdk.test:3443/api/v4/admin/token' \
--header 'Authorization: Bearer <Admin Token from Step 2.1>' \
--header 'Content-Type: application/json' \
--data '{"token": "glptt-token-from-step-2.2"}'

{
	"id": 1,
	"token": "glptt-abc",
	"description": "example",
	"created_at": "2024-11-27T14:18:29.113Z",
	"updated_at": "2024-11-27T14:18:29.113Z",
	"last_used": null,
	"owner": {
	}
}

Related to #506554 (closed)