WASM: Refactor the registry per revision definition

Context

The definition of the registry used by the WSM PVM depends on its current version. It is also very sensitive, performance wise. As a consequence, we use this merge request to try to refactor this code, to make it more straightforward, while using aulso the opportunity to evaluate a bit where the performances of the PVM stands.

Manually testing the MR

Checklist

• Document the interface of any function added or modified (see the coding guidelines)
• Document any change to the user interface, including configuration parameters (see node configuration)
• Provide automatic testing (see the testing guide).
• For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, CHANGES.rst at the root of the repository for everything else).
• Select suitable reviewers using the Reviewers field below.
• Select as Assignee the next person who should take action on that MR