[Feature] batched trajectories - SliceSampler compatibility #9251

Job	Run time
build-wheel-linux (3.8, cp38-cp38, --index-url https://download.pytorch.org/whl/cpu, "['cpu', '11...	1m 34s
build-wheel-linux (3.9, cp39-cp39, --index-url https://download.pytorch.org/whl/cpu, "['cpu', '11...	1m 43s
build-wheel-mac (3.8, 3.8)	1m 52s
build-wheel-linux (3.10, cp310-cp310, --index-url https://download.pytorch.org/whl/cpu, "['cpu', ...	1m 33s
build-wheel-mac (3.9, 3.9)	1m 43s
build-wheel-linux (3.11, cp311-cp311, --index-url https://download.pytorch.org/whl/cpu, "['cpu', ...	1m 35s
build-wheel-mac (3.10, 3.10.3)	2m 8s
build-wheel-windows (3.8, 3.8)	2m 52s
build-wheel-mac (3.11, 3.11)	2m 16s
build-wheel-windows (3.9, 3.9)	2m 50s
build-wheel-windows (3.10, 3.10.3)	3m 28s
build-wheel-windows (3.11, 3.11)	2m 5s
test-wheel (linux, ubuntu-20.04, 3.8)	2m 22s
test-wheel (linux, ubuntu-20.04, 3.9)	2m 41s
test-wheel (linux, ubuntu-20.04, 3.10)	2m 49s
test-wheel (linux, ubuntu-20.04, 3.11)	2m 26s
test-wheel (mac, macos-11, 3.8)	3m 47s
test-wheel (mac, macos-11, 3.9)	3m 29s
test-wheel (mac, macos-11, 3.10)	3m 38s
test-wheel (mac, macos-11, 3.11)	2m 54s
test-wheel-windows (3.8)	5m 9s
test-wheel-windows (3.9)	4m 31s
test-wheel-windows (3.10)	5m 9s
test-wheel-windows (3.11)	5m 2s
	1h 9m 36s

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