[ns] Rename i_async_result -> async_result (#4439)

- [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions).
- [x] I have read and followed the [AI Policy](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/AI.md)
- [x] I have read and followed the [Coding Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/Coding.md) to the best of my ability.

-------------------

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4439
Reviewed-by: lizzie <lizzie@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>

src/core/CMakeLists.txt

@@ -796,6 +796,8 @@ add_library(core STATIC
     hle/service/ns/application_manager_interface.h
     hle/service/ns/application_version_interface.cpp
     hle/service/ns/application_version_interface.h
+    hle/service/ns/async_result.cpp
+    hle/service/ns/async_result.h
     hle/service/ns/content_management_interface.cpp
     hle/service/ns/content_management_interface.h
     hle/service/ns/develop_interface.cpp
@@ -810,8 +812,6 @@ add_library(core STATIC
     hle/service/ns/ecommerce_interface.h
     hle/service/ns/factory_reset_interface.cpp
     hle/service/ns/factory_reset_interface.h
-    hle/service/ns/i_async_result.cpp
-    hle/service/ns/i_async_result.h
     hle/service/ns/language.cpp
     hle/service/ns/language.h
     hle/service/ns/ns.cpp

src/core/hle/service/ns/application_manager_interface.h

@@ -7,7 +7,7 @@
 #pragma once
 
 #include "core/hle/service/cmif_types.h"
-#include "core/hle/service/ns/i_async_result.h"
+#include "core/hle/service/ns/async_result.h"
 #include "core/hle/service/ns/language.h"
 #include "core/hle/service/ns/ns_types.h"
 #include "core/hle/service/os/event.h"