Use storagemethods to load storages for zip file serialization
These were going through bespoke pathways before that were missing handling for endianness. This makes it so they use the same code as legacy serialization which does have handling for endianness switches.
TODO:
* Make it work with untyped storages (it's mostly a POC right now)
* Verify byte-for-byte compatibility (this shouldn't change anything for LE systems)
* Test perf?
