Fix edge runtim path slashes mismatch on windows (#46302)

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Closes NEXT-620

Test with app-playground locally on windows VM

## Bug

- [x] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have a helpful link attached, see
[`contributing.md`](https://github.com/vercel/next.js/blob/canary/contributing.md)

---------

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

packages/next/src/build/webpack/plugins/flight-client-entry-plugin.ts

@@ -594,7 +594,10 @@ export class FlightClientEntryPlugin {
     const clientLoader = `next-flight-client-entry-loader?${stringify({
       modules: this.isEdgeServer
         ? clientImports.map((importPath) =>
-            importPath.replace('next/dist/esm/', 'next/dist/')
+            importPath.replace(
+              /[\\/]next[\\/]dist[\\/]esm[\\/]/,
+              '/next/dist/'.replace(/\//g, path.sep)
+            )
           )
         : clientImports,
       server: false,

packages/next/src/build/webpack/plugins/flight-manifest-plugin.ts

@@ -5,6 +5,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+import path from 'path'
 import { webpack, sources } from 'next/dist/compiled/webpack/webpack'
 import {
   CLIENT_REFERENCE_MANIFEST,
@@ -325,9 +326,13 @@ export class FlightManifestPlugin {
 
         // The client compiler will always use the CJS Next.js build, so here we
         // also add the mapping for the ESM build (Edge runtime) to consume.
-        if (/\/next\/dist\//.test(resource)) {
-          manifest[resource.replace(/\/next\/dist\//, '/next/dist/esm/')] =
-            moduleExports
+        if (/[\\/]next[\\/]dist[\\/]/.test(resource)) {
+          manifest[
+            resource.replace(
+              /[\\/]next[\\/]dist[\\/]/,
+              '/next/dist/esm/'.replace(/\//g, path.sep)
+            )
+          ] = moduleExports
         }
 
         manifest.__ssr_module_mapping__ = moduleIdMapping