test(starknet): Add more integration tests

[hoank101]

Closes: #638

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• Reference GitHub issue
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[romac]

Turning this into a draft PR since the implementation is not complete yet.

[romac]

@hoank101 Are you planning on picking this up again eventually? What kind of new integration tests do you have in mind?

[hoank101]

@hoank101 Are you planning on picking this up again eventually? What kind of new integration tests do you have in mind?

it's ready to test right?

[romac]

@hoank101 Well, the dynamic_validator_set_changes test does not actually changes the validator set between heights. Granted, that requires changes to the app but perhaps you could give it a try if you want?

For the other test, submit_transaction is still a stub and would need to interact with the mempool, which also requires some larger changes to the test framework, so understandable if you don't want to go that route.

Perhaps we can remove the high_load_stress_test and focus on dynamic_validator_set_changes? What do you think?