Set restart_heaps to false after sweep thread wakeup #12911

Job	Run time
Windows 2025/Visual C++ 2022 (test-bundled-gems)	4m 5s
Windows 2025/Visual C++ 2022 (check)	4m 41s
Windows 2022/Visual C++ 2022 (check)	5m 25s
Windows 11-arm/Visual C++ (btest test-basic test-tool)	7m 24s
Windows result	3s
	21m 38s

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