## Description 

In legacy move, we allowed three-place names to use an address in the
first position, even if there was also a module in scope with that name.
Move 2024's resolution rules now require `::` proceeding that name to do
this. This updates migration to support.

Also, this moves writing the edition flag to the `Move.toml` file
_after_ successful migration, so that we aren't updating the it in the
error case.

## Test Plan 

New tests plus more local testing against the sui framework code.
 
---
If your changes are not user-facing and do not break anything, you can
skip the following section. Otherwise, please briefly describe what has
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### Type of Change (Check all that apply)

- [ ] protocol change
- [ ] user-visible impact
- [ ] breaking change for a client SDKs
- [ ] breaking change for FNs (FN binary must upgrade)
- [ ] breaking change for validators or node operators (must upgrade
binaries)
- [ ] breaking change for on-chain data layout
- [ ] necessitate either a data wipe or data migration

### Release notes