- installs React v18 instead of latest in tests- removes Next.js v15 references from lockfile- installs "current" native SWC binaries instead of latest

> [!NOTE]> This is a backport of#73732 for Next.js 14.When using dependencies in Middleware that make use of dynamic codeevaluation, Next.js emits a build error because this is not supported inthe Edge runtime.In rare cases, when the code can not be reached at runtime and can't beremoved by tree-shaking, users might opt in to using the`unstable_allowDynamic` config.When combined with pnpm, the provided glob patterns as documented athttps://nextjs.org/docs/messages/edge-dynamic-code-evaluation#possible-ways-to-fix-itdid not match correctly because of pnpm's use of the `.pnpm` directory.To fix the pattern matching, we need to provide the `dot` option to[picomatch](https://github.com/micromatch/picomatch), which enablesdotfile matching._Side note: Ideally we would detect dynamic code evaluation after treeshaking, to reduce the number of cases where users need to revert tousing `unstable_allowDynamic`._fixes#51401

Backport#73923 to 14.x

…73927)Backport#73925 to 14.x

Updates React from 14898b6a9 to 178c267a4e.### React upstream changes-facebook/react#31842-facebook/react#31841