[edge] fix URLSearchParams lacking data from rewrite

Given the change in vercel#40076, when a middleware rewrites into an Edge
API route and changes the querystring, the changed querystring does
not appear in the incoming NextRequest object in the Edge API route

```ts
// middleware.ts
export function middleware(req: NextRequest) {
  const url = req.nextUrl
    url.pathname = "/api/hello"
    url.searchParams.set("foo", "bar")
    return NextResponse.rewrite(url)
}

// pages/api/hello.ts
import { NextRequest } from "next/server"

export default function handler(req: NextRequest) {
  return NextResponse.json(req.nextUrl.searchParams.get("foo"))
}

export const config = { runtime: "experimental-edge" }
```

Our expectation when requesting `/api/hello` is to see `"bar"`,
but instead we are getting `null` back.

This commit fixes this issue by reading the given `query` instead of using
the initial querystring provided with the user request (prior to rewriting)

packages/next/server/next-server.ts

@@ -2049,9 +2049,7 @@ export default class NextNodeServer extends BaseServer {
 
     // For middleware to "fetch" we must always provide an absolute URL
     const isDataReq = !!params.query.__nextDataReq
-    const query = urlQueryToSearchParams(
-      Object.assign({}, getRequestMeta(params.req, '__NEXT_INIT_QUERY') || {})
-    ).toString()
+    const query = urlQueryToSearchParams(params.query).toString()
     const locale = params.query.__nextLocale
     // Use original pathname (without `/page`) instead of appPath for url
     let normalizedPathname = params.page

test/e2e/middleware-general/app/middleware.js

@@ -47,6 +47,12 @@ export async function middleware(request) {
     return NextResponse.next()
   }
 
+  if (url.pathname === '/api/edge-search-params') {
+    const newUrl = url.clone()
+    newUrl.searchParams.set('foo', 'bar')
+    return NextResponse.rewrite(newUrl)
+  }
+
   if (url.pathname === '/') {
     url.pathname = '/ssg/first'
     return NextResponse.rewrite(url)

test/e2e/middleware-general/app/pages/api/edge-search-params.js

@@ -0,0 +1,10 @@
+import { NextResponse } from 'next/server'
+
+export const config = { runtime: 'experimental-edge' }
+
+/**
+ * @param {import('next/server').NextRequest}
+ */
+export default (req) => {
+  return NextResponse.json(Object.fromEntries(req.nextUrl.searchParams))
+}

test/e2e/middleware-general/test/index.test.ts

@@ -157,6 +157,17 @@ describe('Middleware Runtime', () => {
       })
     }
 
+    it('passes search params with rewrites', async () => {
+      const response = await fetchViaHTTP(next.url, `/api/edge-search-params`, {
+        a: 'b',
+      })
+      await expect(response.json()).resolves.toMatchObject({
+        a: 'b',
+        // included from middleware
+        foo: 'bar',
+      })
+    })
+
     it('should have init header for NextResponse.redirect', async () => {
       const res = await fetchViaHTTP(
         next.url,