dev: check that class exist before using it in BuildGenesisConfig

[kfastov]

Pull Request type

Please add the labels corresponding to the type of changes your PR introduces:

• Feature

What is the current behavior?

Genesis config builder does not check the existence of contract classes

Resolves: #1345

What is the new behavior?

• The executable panics if a class hash mentioned in contracts or sierra_class_hash_to_casm_class_hash is not defined in contract_classes.

Does this introduce a breaking change?

No

[tdelabro]

Great job!

[tdelabro]

@kfastov can you add a line in the CHANGELOG.md file please? So the CI can run ;)

[kfastov]

@tdelabro Yes sure

[tdelabro]

@kfastov just fix the linters and we will merge that asap

[kfastov]

Oh I see there is a linter issue in main now, fixed it in #1400

[tdelabro]

@kfastov Good job! I wait for the CI to pass and I will merge. Thanks a lot

[tdelabro]

@kfastov tests are failing

[kfastov]

@tdelabro I will check tests tomorrow and finish this PR finally. Also, I have done what you said (solution 2), but not yet finished the tests (finding a way to instantiate contract classes in test).

[kfastov]

There is probably an issue with taplo, which had an update recently. I am checking out what the reason may be. We can pin it to v0.5.2 in CI script for now

[tdelabro]

@kfastov you also have to fix a lil discrepancy between the error message expect and the actual one in rpc-tests

[tdelabro]

@kfastov thanks a lot for staying involved in this one although all the rebase conflicts