[Refactor] Deprecate direct usage of memmap tensors #8243

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 32s
build-wheel-linux (3.10, cp310-cp310, --index-url https://download.pytorch.org/whl/cpu, "['cpu', ...	1m 39s
build-wheel-mac (3.8, 3.8)	1m 7s
build-wheel-linux (3.11, cp311-cp311, --index-url https://download.pytorch.org/whl/cpu, "['cpu', ...	1m 39s
build-wheel-windows (3.8, 3.8)	3m 30s
build-wheel-mac (3.9, 3.9)	2m 27s
build-wheel-windows (3.9, 3.9)	2m 4s
build-wheel-mac (3.10, 3.10.3)	1m 37s
build-wheel-windows (3.10, 3.10.3)	3m 42s
build-wheel-mac (3.11, 3.11)	1m 48s
build-wheel-windows (3.11, 3.11)	3m 31s
test-wheel (linux, ubuntu-20.04, 3.8)	2m 3s
test-wheel (linux, ubuntu-20.04, 3.9)	2m 11s
test-wheel (linux, ubuntu-20.04, 3.10)	2m 28s
test-wheel (linux, ubuntu-20.04, 3.11)	4m 22s
test-wheel (mac, macos-latest, 3.8)	3m 18s
test-wheel (mac, macos-latest, 3.9)	1m 45s
test-wheel (mac, macos-latest, 3.10)	2m 30s
test-wheel (mac, macos-latest, 3.11)	2m 3s
test-wheel-windows (3.8)	8m 36s
test-wheel-windows (3.9)	5m 8s
test-wheel-windows (3.10)	4m 0s
test-wheel-windows (3.11)	6m 59s
	1h 11m 33s

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