[DevTools] Console logging and StrictMode double rendering #21889

React currently suppress all console logs while double rendering (or double invoking render phase lifecycles) to reduce console noise, e.g.:
https://github.com/facebook/react/blob/310187264d01a31bc3079358f13662d31a079d9e/packages/react-reconciler/src/ReactFiberBeginWork.new.js#L366-L384

Unfortunately this often causes confusion and leads to complaints (see the discussion on #21783). We could leverage DevTools to improve the default experience and give developers control over this behavior.

• Disable console suppression by default in React.
• Add an API for DevTools and React to communicate about when double rendering (or lifecycles) start and stop.
• DevTools should gray out (but not hide) logs during second render pass by default.
• DevTools should expose a new Debugging preference that allows users to suppress second logs entirely (mimicking the current default behavior).