Merge branch '523037-rich-text-editor-design-tokens' into 'master'

Use design tokens in rich text editor controls

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/183305



Merged-by: Savas Vedova <svedova@gitlab.com>
Approved-by: Michael Le <mle@gitlab.com>
Approved-by: Sascha Eggenberger <seggenberger@gitlab.com>
Approved-by: Chen Charnolevsky <ccharnolevsky@gitlab.com>
Approved-by: Savas Vedova <svedova@gitlab.com>
Reviewed-by: Savas Vedova <svedova@gitlab.com>
Reviewed-by: Chen Charnolevsky <ccharnolevsky@gitlab.com>
Co-authored-by: sdejonge <sdejonge@gitlab.com>