RequestDelegateFactory context classes ApplicationServices property (#41952)

- Added `public IServiceProvider ApplicationServices { get; }` property to `RouteHandlerContext`
  - Enables route handler filter factories to access app services
- Renamed existing `Services` property on `EndpointParameterMetadataContext` and `EndpointMetadataContext` to `ApplicationServices` and made it non-nullable
- Added a unit test & updated another to ensure app's service provider is passed through correctly by `RequestDelegateFactory`

Fixes #41900

1 files changed, 1 insertions, 1 deletions

diff --git a/src/Http/Http.Results/test/CreatedAtRouteResultTests.cs b/src/Http/Http.Results/test/CreatedAtRouteResultTests.cs
index 04c55274d6..eee33d4d84 100644
--- a/src/Http/Http.Results/test/CreatedAtRouteResultTests.cs
+++ b/src/Http/Http.Results/test/CreatedAtRouteResultTests.cs
@@ -71,7 +71,7 @@ public partial class CreatedAtRouteResultTests
         // Arrange
         CreatedAtRoute MyApi() { throw new NotImplementedException(); }
         var metadata = new List<object>();
-        var context = new EndpointMetadataContext(((Delegate)MyApi).GetMethodInfo(), metadata, null);
+        var context = new EndpointMetadataContext(((Delegate)MyApi).GetMethodInfo(), metadata, EmptyServiceProvider.Instance);
 
         // Act
         PopulateMetadata<CreatedAtRoute>(context);