Bugfix: clear PlyStackEntry shared array on return #4500

Job	Run time
make-build (ubuntu-latest)	37s
long-running-tests (ubuntu-latest, LongRunning)	58s
fast-tests (Debug, ubuntu-latest)	34s
make-build (macOS-latest)	50s
build-and-publish (ubuntu-latest)	49s
long-running-tests (windows-latest, LongRunning)	1m 51s
fast-tests (Debug, windows-latest)	1m 53s
build-and-publish (windows-latest)	1m 55s
make-build (macOS-13)	1m 48s
long-running-tests (macOS-latest, LongRunning)	53s
fast-tests (Debug, macOS-latest)	1m 16s
build-and-publish (macOS-latest)	55s
long-running-tests (macOS-13, LongRunning)	54s
fast-tests (Debug, macOS-13)	1m 13s
build-and-publish (macOS-13)	1m 15s
fast-tests (Release, ubuntu-latest)	55s
other-tests (ubuntu-latest, Configuration)	55s
fast-tests (Release, windows-latest)	1m 50s
other-tests (windows-latest, Configuration)	1m 50s
perft-tests (ubuntu-latest, Perft)	53s
fast-tests (Release, macOS-latest)	46s
winning-at-chess (ubuntu-latest, WinningAtChess_FixedTime)	37s
other-tests (macOS-latest, Configuration)	38s
perft-tests (windows-latest, Perft)	2m 1s
fast-tests (Release, macOS-13)	1m 24s
other-tests (macOS-13, Configuration)	1m 20s
perft-tests (macOS-latest, Perft)	1m 20s
	32m 10s

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