kernel: Update to use atmosphere macros and correct Result (#7242)

* kernel: Switch to atmosphere style macros

* code: Rename ResultCode to Result

* code: Result constants are lower case

* Address review comments

* core: Remove CASCADE_CODE

* R_TRY replaces completely

* core: Run clang format

src/core/hle/kernel/server_session.h

@@ -66,9 +66,9 @@ public:
     /**
      * Handle a sync request from the emulated application.
      * @param thread Thread that initiated the request.
-     * @returns ResultCode from the operation.
+     * @returns Result from the operation.
      */
-    ResultCode HandleSyncRequest(std::shared_ptr<Thread> thread);
+    Result HandleSyncRequest(std::shared_ptr<Thread> thread);
 
     bool ShouldWait(const Thread* thread) const override;