Convert Dashboard Header buttons to Mantine (#46632)

...metabase/dashboard/components/DashboardActions.styled.tsx

...s/DashboardEmbedAction/DashboardEmbedAction.unit.spec.tsx

...ard/components/DashboardHeader/DashboardHeader.styled.tsx

...shboardHeader/DashboardHeaderButtonRow/action-buttons.tsx

...onents/DashboardHeader/buttons/AddActionElementButton.tsx

...ents/DashboardHeader/buttons/AddFilterParameterButton.tsx

...onents/DashboardHeader/buttons/AddHeadingOrTextButton.tsx

.../components/DashboardHeader/buttons/AddLinkCardButton.tsx

.../components/DashboardHeader/buttons/AddQuestionButton.tsx

...ader/buttons/AddSectionButton/AddSectionButton.module.css

...boardHeader/buttons/AddSectionButton/AddSectionButton.tsx

...ponents/DashboardHeader/buttons/AddSectionButton/index.ts

...ponents/DashboardHeader/buttons/AddTemporalUnitButton.tsx

...omponents/DashboardHeader/buttons/DashboardInfoButton.tsx

...s/DashboardHeader/buttons/DashboardSubscriptionButton.tsx

...omponents/DashboardHeader/buttons/EditDashboardButton.tsx

.../DashboardHeader/buttons/FullscreenAnalyticsDashboard.tsx

...d/components/DashboardHeader/buttons/FullscreenToggle.tsx

...ponents/DashboardHeader/buttons/NightModeToggleButton.tsx

...oard/components/EmbedMenu/NonAdminEmbedMenu.unit.spec.tsx