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/client_session.h

@@ -42,9 +42,9 @@ public:
     /**
      * Sends an SyncRequest from the current emulated thread.
      * @param thread Thread that initiated the request.
-     * @return ResultCode of the operation.
+     * @return Result of the operation.
      */
-    ResultCode SendSyncRequest(std::shared_ptr<Thread> thread);
+    Result SendSyncRequest(std::shared_ptr<Thread> thread);
 
     std::string name; ///< Name of client port (optional)