feat: allow to provide token styles in TokenSelector components

mentioned in commit b5e169de

mentioned in merge request gitlab-org/gitlab-services/design.gitlab.com!2477 (merged)

mentioned in merge request status-page!337 (closed)

mentioned in merge request status-page!338 (merged)

mentioned in merge request gitlab-org/gitlab-services/design.gitlab.com!2479 (merged)

mentioned in merge request status-page!339 (merged)

mentioned in merge request gitlab-docs!2021 (merged)

mentioned in merge request gitlab-docs!2023 (merged)