Add gloas state transition comptests generator

[ericsson49]

This PR introduces a compliance test generator for state transition functionality. Tests are generated using a model-based approach (randomized instantiations will be added in near future).
Currently, it targets the gloas fork with the minimal preset. Support of more forks is planned in future.

It produces tests in operations or epoch processing test formats. Other test formats are planned in future too (e.g. sanity).

State transition comptests can be generated using the same command as the fork choice comptests:

> make comptests kind=state_transition comptests_dir=<dir>

Operation handlers:

• attestation
• builder_deposit_request
• builder_exit_request
• consolidation_request
• deposit_request
• execution_payload_bid
• parent_execution_payload
• payload_attestation
• proposer_slashing
• withdrawal_request
• withdrawals

Epoch-processing handlers:

• builder_pending_payments
• pending_deposits
• ptc_window

To do list

• Add randomization to the state transition comptests generator
• Improve models
• Improve coverage