refactor(@angular/build): Enable SSR with Prerendering Disabled in Vite

This commit enables server-side rendering (SSR) in Vite when prerendering is turned off. It also imports `@angular/compiler` in the SSR middleware to resolve the following issue:

```
[vite] Internal server error: The injectable 'PlatformNavigation' needs to be compiled using the JIT compiler, but '@angular/compiler' is not available.

The injectable is part of a library that has been partially compiled. However, the Angular Linker has not processed the library to utilize JIT compilation as a fallback.

Ideally, the library should be processed with the Angular Linker for complete AOT compilation.
```

Closes #28523

Author: alan-agius4

packages/angular/build/src/builders/dev-server/vite-server.ts

@@ -103,6 +103,7 @@ export async function* serveWithVite(
     // Disable prerendering if enabled and force SSR.
     // This is so instead of prerendering all the routes for every change, the page is "prerendered" when it is requested.
     browserOptions.prerender = false;
+    browserOptions.ssr ||= true;
   }
 
   // Set all packages as external to support Vite's prebundle caching

packages/angular/build/src/tools/vite/middlewares/ssr-middleware.ts

@@ -34,6 +34,9 @@ export function createAngularSsrInternalMiddleware(
     }
 
     (async () => {
+      // Load the compiler because `@angular/ssr/node` depends on `@angular/` packages,
+      // which must be processed by the runtime linker, even if they are not used.
+      await loadEsmModule('@angular/compiler');
       const { writeResponseToNodeResponse, createWebRequestFromNodeRequest } =
         await loadEsmModule<typeof import('@angular/ssr/node')>('@angular/ssr/node');
 
@@ -76,6 +79,10 @@ export async function createAngularSsrExternalMiddleware(
     | ReturnType<typeof createAngularSsrInternalMiddleware>
     | undefined;
 
+  // Load the compiler because `@angular/ssr/node` depends on `@angular/` packages,
+  // which must be processed by the runtime linker, even if they are not used.
+  await loadEsmModule('@angular/compiler');
+
   const { createWebRequestFromNodeRequest, writeResponseToNodeResponse } =
     await loadEsmModule<typeof import('@angular/ssr/node')>('@angular/ssr/node');