Add SCIM token reset to admin token API

What does this MR do and why?

SCIM tokens can now be reset (replaced with a new value) using the admin token API.

🛠️ with ❤️ at Siemens

References

• Admin Token API: Reset SCIM Tokens (#605076 - closed)
• Admin Token: Identify SCIM Tokens (#512768 - closed)
• Admin Token API (&15777)
• https://docs.gitlab.com/ee/api/admin/token.html

How to set up and validate locally

How to set up and validate locally

1. Follow the instructions on how to test SCIM tokens.
2. Create instance and group scim tokens as described above.
3. Create a personal access token with admin_mode and api capabilities. Preferences > Access Tokens > Add a new token to query the token information api.
4. Query the API:

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

5. Now reset the token:

curl -k --request DELETE \
--url 'https://gdk.test:3443/api/v4/admin/token' \
--header 'Authorization: Bearer <Admin Token>' \
--header 'Content-Type: application/json' \
--data '{"token": "glsoat-from-above"}'

6. Query it again like in step 4 with a POST - you should now get a NOT FOUND.

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

Related to &15777