## Description 

Adds a function to write managed addresses for a root package, keyed by
chain ID.

This function is only executed by the test currently, not hooked up to
`sui client publish` or `sui client upgrade` just yet!

See inline comments for more.

## Test Plan 

Added test

---
If your changes are not user-facing and do not break anything, you can
skip the following section. Otherwise, please briefly describe what has
changed under the Release Notes section.

### 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