Introduce code cache and loader V2

[georgemitenkov]

Description

This PR keeps track of all loader & code cache changes, and will be linked to an AIP.

Type of Change

• [x] New feature
• [x] Bug fix
• [x] Breaking change
• [x] Performance improvement
• [x] Refactoring
• [ ] Dependency update
• [ ] Documentation update
• [ ] Tests

Which Components or Systems Does This Change Impact?

• [ ] Validator Node
• [ ] Full Node (API, Indexer, etc.)
• [x] Move/Aptos Virtual Machine
• [ ] Aptos Framework
• [ ] Aptos CLI/SDK
• [ ] Developer Infrastructure
• [ ] Other (specify)

How Has This Been Tested?

Key Areas to Review

Checklist

• [ ] I have read and followed the CONTRIBUTING doc
• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I identified and added all stakeholders and component owners affected by this change as reviewers
• [ ] I tested both happy and unhappy path of the functionality
• [ ] I have made corresponding changes to the documentation