Client/Michelson: add minimal client support for TZT

Context

This MR adds a run unit tests command in the client which can be used to run a set of unit tests similarly to how typecheck script can be used to type check that a set of scripts.

The support for the TZT format added in this commit is very minimal; only the mandatory primitives input, output, and code are recognized.

Stacked on !10911 (merged).

TODO:

• remove all asserts

Manually testing the MR

• clone the TZT repository (https://gitlab.com/tezos/tzt-reference-test-suite/)

• Run the following command: octez-client run unit tests from /path/to/tzt-reference-test-suite/*.tzt

Since the support for TZT in this MR is very partial, many tests will fail and this is expected.

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