Proto/Michelson: refactor the representation of types to remember the size

Context

This MR refactors the representation of Michelson types to add metadata.

Currently the only metadata are the optional type annotation and the size of the type. The various type attributes are also good candidates. This is also probably a requirement for hash consing Michelson types.

The stored types are used to ensure the global size bound on types and the previous complex system (the "number_of_growing_types" mechanism) is removed.

Manually testing the MR

TODO

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, the Development Version section of CHANGES.md for everything else).
• Select suitable reviewers using the Reviewers field below.
• Select as Assignee the next person who should take action on that MR