[move][move-vm] Add more benchmarks, slightly reorganize the code

[cgswords]

Description

This adds a few more benchmarks to the current VM benchmark suite, plus reorganizes it slightly

Test plan

cargo bench in the directory

---

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.

• [ ] Protocol:
• [ ] Nodes (Validators and Full nodes):
• [ ] Indexer:
• [ ] JSON-RPC:
• [ ] GraphQL:
• [ ] CLI:
• [ ] Rust SDK:
• [ ] REST API: