Fix code quality CI has "Partial class with single part in class.cs" issue. #528

Job	Run time
Build only (Android)	4m 36s
Build only (iOS)	0s
Test (Windows, windows-latest, SingleThread)	2m 43s
Code Quality	3m 54s
Test (Windows, windows-latest, MultiThreaded)	5m 15s
Test (macOS, macos-latest, SingleThread)	1m 12s
Test (macOS, macos-latest, MultiThreaded)	1m 7s
Test (Linux, ubuntu-latest, SingleThread)	1m 1s
Test (Linux, ubuntu-latest, MultiThreaded)	1m 23s
	21m 11s

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