Fix loading data on different encoding (#94503)
Add endianness marker when saving,
and if it doesn't match host endianness when loading data, do a byteswap.
Older data will load correctly only on systems
with same endianness it was saved on.
New data should load correctly on systems
with any endianness.
Fixes #65300
Pull Request resolved: https://github.com/pytorch/pytorch/pull/94503
Approved by: https://github.com/kurtamohler, https://github.com/ezyang
