## Description 

Boxes fields in the `MoveTypeLayout` to make the enum size smaller for
type layouts.

## Test plan 

Added test to check size of the enums + make sure existing tests pass. 

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## Release notes

Check each box that your changes affect. If none of the boxes relate to
your changes, release notes aren't required.

For each box you select, include information after the relevant heading
that describes the impact of your changes that a user might notice and
any actions they must take to implement updates.

- [X] Protocol: Increase the maximum type layout size in the VM. Most
users should not notice this change.
- [ ] Nodes (Validators and Full nodes): 
- [ ] Indexer: 
- [ ] JSON-RPC: 
- [ ] GraphQL: 
- [ ] CLI: 
- [ ] Rust SDK:
- [ ] REST API: