Migrate bg-brand-hover to JS colors (#24427)

...etabase/admin/datamodel/components/ObjectActionSelect.jsx

.../admin/datamodel/components/ObjectActionSelect.styled.tsx

...tend/src/metabase/admin/datamodel/containers/FieldApp.jsx

...c/metabase/admin/datamodel/containers/FieldApp.styled.tsx

...nd/src/metabase/admin/people/components/GroupsListing.jsx

...metabase/admin/people/components/GroupsListing.styled.tsx

...ase/admin/settings/components/widgets/HostingInfoLink.jsx

...onents/widgets/HostingInfoLink/HostingInfoLink.styled.tsx

...gs/components/widgets/HostingInfoLink/HostingInfoLink.tsx

...dmin/settings/components/widgets/HostingInfoLink/index.ts

frontend/src/metabase/components/CopyWidget.jsx

frontend/src/metabase/components/CopyWidget.styled.tsx

...ts/DateQuarterYearWidget/DateQuarterYearWidget.styled.tsx

...omponents/DateQuarterYearWidget/DateQuarterYearWidget.tsx

frontend/src/metabase/components/DownloadButton.jsx

frontend/src/metabase/components/DownloadButton.styled.tsx

frontend/src/metabase/containers/ItemPicker.jsx

frontend/src/metabase/containers/ItemPicker.styled.tsx

frontend/src/metabase/css/components/token.css

frontend/src/metabase/css/core/colors.css