Favicon.ico is not an error. (#2640)

Closes #2539

Prevents error message in console that is not a real error. 


![image](https://github.com/user-attachments/assets/3794163c-323f-4685-b933-f53afdf71420)

---------

Co-authored-by: Aniruddh Munde <[email protected]>
Co-authored-by: Ruben Cerna <[email protected]>
Co-authored-by: RubenCerna2079 <[email protected]>

Author: 3 people

src/Service.Tests/Configuration/ConfigurationTests.cs

@@ -1982,11 +1982,9 @@ public void TestGetConfigFileNameForEnvironment(
         [DataRow("/graphql?query={book_by_pk(id: 1){title}}",
             HostMode.Production, HttpStatusCode.OK, "data",
             DisplayName = "GraphQL endpoint with query in production mode.")]
-        [DataRow(RestController.REDIRECTED_ROUTE, HostMode.Development, HttpStatusCode.BadRequest,
-            "GraphQL request redirected to favicon.ico.",
+        [DataRow(RestController.REDIRECTED_ROUTE, HostMode.Development, HttpStatusCode.NotFound, "Not Found",
             DisplayName = "Redirected endpoint in development mode.")]
-        [DataRow(RestController.REDIRECTED_ROUTE, HostMode.Production, HttpStatusCode.BadRequest,
-            "GraphQL request redirected to favicon.ico.",
+        [DataRow(RestController.REDIRECTED_ROUTE, HostMode.Production, HttpStatusCode.NotFound, "Not Found",
             DisplayName = "Redirected endpoint in production mode.")]
         public async Task TestInteractiveGraphQLEndpoints(
             string endpoint,
@@ -2010,8 +2008,8 @@ public async Task TestInteractiveGraphQLEndpoints(
             File.WriteAllText(CUSTOM_CONFIG, configWithCustomHostMode.ToJson());
             string[] args = new[]
             {
-            $"--ConfigFileName={CUSTOM_CONFIG}"
-        };
+                $"--ConfigFileName={CUSTOM_CONFIG}"
+            };
 
             using TestServer server = new(Program.CreateWebHostBuilder(args));
             using HttpClient client = server.CreateClient();

src/Service/Controllers/RestController.cs

@@ -189,10 +189,7 @@ private async Task<IActionResult> HandleOperation(
             {
                 if (route.Equals(REDIRECTED_ROUTE))
                 {
-                    throw new DataApiBuilderException(
-                        message: $"GraphQL request redirected to {REDIRECTED_ROUTE}.",
-                        statusCode: HttpStatusCode.BadRequest,
-                        subStatusCode: DataApiBuilderException.SubStatusCodes.BadRequest);
+                    return NotFound();
                 }
 
                 // Validate the PathBase matches the configured REST path.