Upgrade React from 43bcbf80-20260603 to e730b5e6-20260612

[vercel-release-bot]

diff facebook/react@43bcbf80...e730b5e6

React upstream changes

• [flow] Update files synced to react-native to use modern flow syntax react/react#36759
• Update required references to GitHub repo react/react#36752
• [compiler] Remove OXC and SWC plugins in favor of them being handled by those projects react/react#36743
• [rust-compiler] Carry uninspected AST subtrees as raw JSON text react/react#36730
• [rust-compiler] Return the compiled AST by value instead of JSON react/react#36729
• [rust-compiler] Drop the regex dependency from the napi binary react/react#36727
• [rust-compiler] Add release profile: fat LTO, one codegen unit, strip react/react#36726
• [compiler] Port React Compiler to Rust react/react#36173
• [flow] Bump flow to v0.317.0 react/react#36701
• [flow] Bump flow to v0.307.1 react/react#36199

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Failing test suites

Commit: 2df864b | About building and testing Next.js

pnpm test-start test/production/app-dir/metadata-static-route-cache/metadata-static-route-cache.test.ts (job)

• app dir - metadata static routes cache > should generate different content after replace the static metadata file (DD)

Expand output

● app dir - metadata static routes cache › should generate different content after replace the static metadata file

next already started

  65 |   ) {
  66 |     if (this.childProcess) {
> 67 |       throw new Error('next already started')
     |             ^
  68 |     }
  69 |
  70 |     this._cliOutput = ''

  at NextStartInstance.start (lib/next-modes/next-start.ts:67:13)
  at Object.start (production/app-dir/metadata-static-route-cache/metadata-static-route-cache.test.ts:17:16)

pnpm test-dev-turbo test/development/app-dir/cache-components-dev-streaming/cache-components-dev-streaming.test.ts (turbopack) (job)

• cache-components-dev-streaming > shows the private-cache fallback on a cold client navigation but not on a warm one (DD)

Expand output

● cache-components-dev-streaming › shows the private-cache fallback on a cold client navigation but not on a warm one

expect(received).toBe(expected) // Object.is equality

Expected: false
Received: true

  191 |     expect(
  192 |       await browser.eval(() => (window as any).__privateFallbackSeen)
> 193 |     ).toBe(false)
      |       ^
  194 |   })
  195 |
  196 |   // The following are smoke tests that Cache Components validation still

  at Object.toBe (development/app-dir/cache-components-dev-streaming/cache-components-dev-streaming.test.ts:193:7)