Error on mismatched minimal react version (#65806)

### What
Error when users installing react@18 and requires higher version

### Why

The architecture now already requires to have `react@beta` or
`react@rc`. Especially where we need to load `react-server` condition of
react, which is erroring now in react 18.

packages/next/src/build/webpack-config.ts

@@ -105,8 +105,8 @@ const NEXT_PROJECT_ROOT_DIST_CLIENT = path.join(
   'client'
 )
 
-if (parseInt(React.version) < 18) {
-  throw new Error('Next.js requires react >= 18.2.0 to be installed.')
+if (parseInt(React.version) < 19) {
+  throw new Error('Next.js requires react >= 19.0.0 to be installed.')
 }
 
 export const babelIncludeRegexes: RegExp[] = [

test/e2e/yarn-pnp/test/utils.ts

@@ -43,6 +43,8 @@ export function runTests(
         dependencies: {
           ...packageJson.dependencies,
           ...packageJson.devDependencies,
+          react: '19.0.0-beta-04b058868c-20240508',
+          'react-dom': '19.0.0-beta-04b058868c-20240508',
         },
         installCommand: ({ dependencies }) => {
           const pkgs = Object.keys(dependencies).reduce((prev, cur) => {