[Sophon] Support to detect patch from HYP's LDiff

Now Collapse can use patch that already been downloaded by HoYoPlay and use it for patch, or vice versa (Download the pre-load on Collapse, apply on HoYoPlay later)

Author: neon-nyan

CollapseLauncher/Classes/InstallManagement/Base/InstallManagerBase.SophonPatch.cs

@@ -460,7 +460,7 @@ protected virtual async Task StartAlterSophonPatch(HttpClient
                 TaskScheduler          = TaskScheduler.Default
             };
 
-            string patchOutputDir = _gameSophonChunkDir;
+            string patchOutputDir = Path.Combine(GamePath, "ldiff");
 
             // Get download sizes
             long downloadSizeTotalAssetRemote = patchAssets.Where(x => x.PatchMethod != SophonPatchMethod.Remove).Sum(x => x.TargetFileSize);