Replace GlFormText in DuoChat

See merge request gitlab-org/gitlab-ui!4489



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: GitLab Bot <gitlab-bot@gitlab.com>
Co-authored-by: Vanessa Otto <votto@gitlab.com>

Introduces new design tokens to implement changes for darkmode.

feat(Alert): Update component (for darkmode)

See merge request gitlab-org/gitlab-ui!4481



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

# [89.7.0](gitlab-org/gitlab-ui@v89.6.0...v89.7.0) (2024-08-21)

### Features

* **Alert:** Update darkmode ([54007c29](gitlab-org/gitlab-ui@54007c29))