wip - sync the finalizer table and the flag with a mutex #10507

Job	Run time
Windows 2019/Visual C++ 2015 (check)	24m 36s
Windows 2019/Visual C++ 2019 (check)	24m 38s
Windows 2022/Visual C++ 2019 (check)	25m 17s
Windows 2025/Visual C++ 2019 (check)	30m 12s
Windows 11-arm/Visual C++ (btest test-basic test-tool)	17m 3s
Windows 2022/Visual C++ 2019 (test-bundled-gems)	32m 26s
Windows result	1s
	2h 34m 13s

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