Use Mantine Components for `QueryDownloadWidget` and `QueryDownloadPopover` (#45104)

...d/src/metabase/dashboard/components/DashCard/DashCard.tsx

...shboard/components/DashCard/DashCardMenu/DashCardMenu.tsx

...mponents/DashCard/DashCardMenu/DashCardMenu.unit.spec.tsx

...e/dashboard/components/DashCard/DashCardVisualization.tsx

...components/QueryDownloadPopover/DownloadButton.module.css

...uilder/components/QueryDownloadPopover/DownloadButton.tsx

...ents/QueryDownloadPopover/QueryDownloadPopover.styled.tsx

.../components/QueryDownloadPopover/QueryDownloadPopover.tsx

...s/QueryDownloadPopover/QueryDownloadPopover.unit.spec.tsx

...se/query_builder/components/QueryDownloadPopover/index.ts

...lder/components/QueryDownloadPopover/use-download-data.ts

...se/query_builder/components/QueryDownloadPopover/utils.ts

...er/components/QueryDownloadWidget/QueryDownloadWidget.tsx