[Blazor] Fix PWA service worker to handle redirected cached responses (#64612)

* Initial plan

* Fix Blazor PWA service worker to handle redirected cached responses

Handle redirected responses in onFetch by creating a new Response object
without the redirected flag. This fixes issues with hosts like Cloudflare
Pages that redirect index.html requests.

Fixes #33872

Co-authored-by: javiercn <6995051+javiercn@users.noreply.github.com>

* Clone response before extracting body for safer handling

Address code review feedback by cloning the cached response before
creating a new Response object, ensuring the body can be safely read.

Co-authored-by: javiercn <6995051+javiercn@users.noreply.github.com>

* Apply suggestion from @javiercn

* Apply suggestion from @javiercn

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: javiercn <6995051+javiercn@users.noreply.github.com>
Co-authored-by: Javier Calvarro Nelson <jacalvar@microsoft.com>

Author: Copilot

src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/wwwroot/service-worker.published.js

@@ -51,5 +51,14 @@ async function onFetch(event) {
         cachedResponse = await cache.match(request);
     }
 
+    if (cachedResponse && cachedResponse.redirected) {
+        const clonedResponse = cachedResponse.clone();
+        cachedResponse = new Response(clonedResponse.body, {
+            headers: clonedResponse.headers,
+            status: clonedResponse.status,
+            statusText: clonedResponse.statusText
+        });
+    }
+
     return cachedResponse || fetch(event.request);
 }