[BugFix, Test] Fix flaky gym vecenvs tests #8432

Job	Run time
build-wheel-linux (3.8, cp38-cp38, --index-url https://download.pytorch.org/whl/cpu, "['cpu', '11...	1m 34s
build-wheel-mac (3.8, 3.8)	3m 13s
build-wheel-windows (3.8, 3.8)	3m 7s
build-wheel-mac (3.9, 3.9)	4m 40s
build-wheel-windows (3.9, 3.9)	3m 37s
build-wheel-mac (3.10, 3.10.3)	1m 33s
build-wheel-windows (3.10, 3.10.3)	3m 19s
build-wheel-mac (3.11, 3.11)	1m 29s
build-wheel-windows (3.11, 3.11)	1m 56s
build-wheel-linux (3.9, cp39-cp39, --index-url https://download.pytorch.org/whl/cpu, "['cpu', '11...	1m 40s
build-wheel-linux (3.10, cp310-cp310, --index-url https://download.pytorch.org/whl/cpu, "['cpu', ...	1m 33s
build-wheel-linux (3.11, cp311-cp311, --index-url https://download.pytorch.org/whl/cpu, "['cpu', ...	1m 35s
test-wheel-windows (3.8)	4m 25s
test-wheel-windows (3.9)	4m 54s
test-wheel-windows (3.10)	3m 15s
test-wheel-windows (3.11)	5m 9s
test-wheel (linux, ubuntu-20.04, 3.8)	3m 8s
test-wheel (linux, ubuntu-20.04, 3.9)	3m 29s
test-wheel (linux, ubuntu-20.04, 3.10)	3m 14s
test-wheel (linux, ubuntu-20.04, 3.11)	2m 12s
test-wheel (mac, macos-latest, 3.8)	6m 53s
test-wheel (mac, macos-latest, 3.9)	2m 25s
test-wheel (mac, macos-latest, 3.10)	2m 47s
test-wheel (mac, macos-latest, 3.11)	2m 3s
	1h 13m 10s

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