[react] Types for 20

[eps1lon]

React 20 is not released. This issue is meant to collect type-related breaking changes we want to ship with the next major:

1. Mark error from componentDidCatch to be unknown: [react] Mark error from componentDidCatch to be unknown #69434 (review)

[typescript-bot]

Thanks for the discussion about "react", some useful links for everyone:

• npm
• DT
• Related discussions

Pinging the DT module owners: @johnnyreilly, @bbenezech, @pzavolinsky, @ericanderson, @DovydasNavickas, @theruther4d, @guilhermehubner, @ferdaber, @jrakotoharisoa, @pascaloliv, @Hotell, @franklixuefei, @Jessidhia, @saranshkataria, @lukyth, @eps1lon, @zieka, @dancerphil, @dimitropoulos, @disjukr, @vhfmag, @hellatan, @priyanshurav, @Semigradsky, @mattpocock.