refactor(verification): create vertex verifiers [part 1/5]

[glevco]

Depends on #794

Motivation

This is the first PR in a 5-part series of PRs that completely move verification-related code out of the vertex model classes. This series is a continuation of the already merged #779.

In this PR, the module scaffolding introduced in the previous PR is changed to a classes structure that mimics the existing model classes structure. This allows easier incremental migration of code, as the inheritance tree is kept the same. In the future, if we untangle the inherited calls in verification methods, we may convert this back to modules, which would be the ideal solution in my opinion.

Acceptance Criteria

• Move block_verification, transaction_verification, and token_creation_tx_verification modules to each respective new Verifier class. No logic should be changed, only moving module functions to class methods.
• Also create a VertexVerifier superclass and a Verifier class for MergeMinedBlock, completing verifiers for all 4 vertex types, and setting up the same inheritance tree as the vertex class themselves.
• Update VerificationService to receive the new VertexVerifiers named tuple, for injecting verifiers (this will be useful for the simulator). Also, update methods to use each respective verifier.
• Update Builder and CliBuilder accordingly.

Checklist

• If you are requesting a merge into master, confirm this code is production-ready and can be included in future releases as soon as it gets merged

[codecov]

Codecov Report

All modified lines are covered by tests ✅

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Additional details and impacted files

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The base branch was changed.