Update feedback tokens and apply them to the modal.

BREAKING CHANGE: Update the popover to use new semantic overlap design
tokens and remove the contextual ones.

feat(Modal): Use new semantic bg tokens

See merge request gitlab-org/gitlab-ui!4593



Merged-by: Scott de Jonge <sdejonge@gitlab.com>
Approved-by: Scott de Jonge <sdejonge@gitlab.com>
Approved-by: Dan MH <dmizzi-harris@gitlab.com>
Co-authored-by: Jeremy Elder <jelder@gitlab.com>

feat(Popover): Use new semantic bg tokens

See merge request gitlab-org/gitlab-ui!4592



Merged-by: Scott de Jonge <sdejonge@gitlab.com>
Approved-by: Scott de Jonge <sdejonge@gitlab.com>
Approved-by: Dan MH <dmizzi-harris@gitlab.com>
Co-authored-by: Jeremy Elder <jelder@gitlab.com>

feat(Feedback): Update feedback tokens

See merge request gitlab-org/gitlab-ui!4594



Merged-by: Scott de Jonge <sdejonge@gitlab.com>
Approved-by: Scott de Jonge <sdejonge@gitlab.com>
Approved-by: Dan MH <dmizzi-harris@gitlab.com>
Reviewed-by: Scott de Jonge <sdejonge@gitlab.com>
Co-authored-by: Jeremy Elder <jelder@gitlab.com>
Co-authored-by: GitLab Bot <gitlab-bot@gitlab.com>

# [92.0.0](gitlab-org/gitlab-ui@v91.15.0...v92.0.0) (2024-09-10)

### Features

* **Feedback:** Update feedback tokens ([2f47efa9](gitlab-org/gitlab-ui@2f47efa9))
* **Modal:** Use new semantic bg tokens ([bf79388f](gitlab-org/gitlab-ui@bf79388f))
* **Popover:** Use new semantic bg tokens ([6113aa2e](gitlab-org/gitlab-ui@6113aa2e))
* **Toast:** Remove SCSS var ([fe324927](gitlab-org/gitlab-ui@fe324927))

### BREAKING CHANGES

* **Popover:** Update the popover to use new semantic overlap design
tokens and remove the contextual ones.