core: hle: kernel: KThread: Replace Suspend with UpdateState & various updates.

- This makes our implementations of these more closely match HOS.

src/core/hle/kernel/k_thread.h

@@ -192,9 +192,9 @@ public:
 
     void TrySuspend();
 
-    void Continue();
+    void UpdateState();
 
-    void Suspend();
+    void Continue();
 
     constexpr void SetSyncedIndex(s32 index) {
         synced_index = index;