Bump @tippy.js/react to @tippyjs/react

This package was renamed, and so will not be automatically upgraded by Renovate bot.

See: https://github.com/atomiks/tippyjs-react/releases/tag/v4.0.0

This new package also comes with breaking changes. The biggest one seems to be the removal of the TippySingleton component, which has been replaced with the useSingleton hook. This complicates matters somewhat as we defer the loading of our tooltip components, and it's illegal to call hooks conditionally, which the TooltipGroup component currently does in src/views/components/Tooltip/index.tsx.

Possible solutions

• Suspend instead of using our DIY useEffect. This can be done now with React.lazy or in the future after more mature Suspense infra has been added to our codebase (e.g. #2922).
• Implement our own TooltipGroup component somehow so that we can render it conditionally. This can potentially be done by creating a new React context containing the singleton stuff, which can then be consumed by our Tooltip components.

Once upgraded, we'll also want to ensure that our CSS isn't broken during the upgrade.

Start with src/views/components/Tooltip/index.tsx and the @tippyjs/react v4.0.0 release notes, focusing on TooltipGroup, deferred tooltip loading, and the removal of TippySingleton in favor of useSingleton. Compare the possible Suspense or context-based approaches described in the issue. Done means the package is upgraded, the tooltip behavior works with the new API, and the existing CSS is not broken.