CI/CD settings were moved to a vue table in
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/41864. We
introduced the graphql endpoint to update a trigger token in
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/126537.
This MR streamlines the trigger token edit flow to use a pop up
modal and call the GraphQL endpoint instead of taking users to a
separate page.

Changelog: changed