[Feature] Composite replay buffers #8606

Job	Run time
build-wheel-linux (3.8, cp38-cp38, --index-url https://download.pytorch.org/whl/cpu, "['cpu', '11...	1m 39s
build-wheel-mac (3.8, 3.8)	1m 36s
build-wheel-windows (3.8, 3.8)	2m 27s
build-wheel-mac (3.9, 3.9)	1m 27s
build-wheel-windows (3.9, 3.9)	2m 2s
build-wheel-mac (3.10, 3.10.3)	1m 47s
build-wheel-windows (3.10, 3.10.3)	2m 37s
build-wheel-mac (3.11, 3.11)	2m 30s
build-wheel-windows (3.11, 3.11)	2m 5s
build-wheel-linux (3.9, cp39-cp39, --index-url https://download.pytorch.org/whl/cpu, "['cpu', '11...	1m 34s
build-wheel-linux (3.10, cp310-cp310, --index-url https://download.pytorch.org/whl/cpu, "['cpu', ...	1m 34s
build-wheel-linux (3.11, cp311-cp311, --index-url https://download.pytorch.org/whl/cpu, "['cpu', ...	1m 34s
test-wheel (linux, ubuntu-20.04, 3.8)	2m 20s
test-wheel (linux, ubuntu-20.04, 3.9)	2m 10s
test-wheel (linux, ubuntu-20.04, 3.10)	3m 6s
test-wheel (linux, ubuntu-20.04, 3.11)	2m 15s
test-wheel (mac, macos-latest, 3.8)	5m 28s
test-wheel (mac, macos-latest, 3.9)	2m 10s
test-wheel (mac, macos-latest, 3.10)	3m 7s
test-wheel (mac, macos-latest, 3.11)	1m 56s
test-wheel-windows (3.8)	4m 56s
test-wheel-windows (3.9)	3m 46s
test-wheel-windows (3.10)	3m 35s
test-wheel-windows (3.11)	4m 58s
	1h 2m 39s

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