Change nint -> IntPtr (#28453)

- Forgot to change this back as part of function pointer changes

Author: davidfowl

src/Servers/IIS/IIS/src/Core/IISNativeApplication.cs

@@ -38,13 +38,13 @@ public void StopCallsIntoManaged()
         }
 
         public unsafe void RegisterCallbacks(
-            delegate* unmanaged<nint, nint, NativeMethods.REQUEST_NOTIFICATION_STATUS> requestCallback,
-            delegate* unmanaged<nint, int> shutdownCallback,
-            delegate* unmanaged<nint, void> disconnectCallback,
-            delegate* unmanaged<nint, int, int, NativeMethods.REQUEST_NOTIFICATION_STATUS> asyncCallback,
-            delegate* unmanaged<nint, void> requestsDrainedHandler,
-            nint pvRequestContext,
-            nint pvShutdownContext)
+            delegate* unmanaged<IntPtr, IntPtr, NativeMethods.REQUEST_NOTIFICATION_STATUS> requestCallback,
+            delegate* unmanaged<IntPtr, int> shutdownCallback,
+            delegate* unmanaged<IntPtr, void> disconnectCallback,
+            delegate* unmanaged<IntPtr, int, int, NativeMethods.REQUEST_NOTIFICATION_STATUS> asyncCallback,
+            delegate* unmanaged<IntPtr, void> requestsDrainedHandler,
+            IntPtr pvRequestContext,
+            IntPtr pvShutdownContext)
         {
             NativeMethods.HttpRegisterCallbacks(
                 _nativeApplication,