dev: implement Set[Address] type

[Eikix]

to prepare for EVM struct, implement the Set[Address] type for key account_to_delete

Tasks

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1. create SetAddress struct in fork_types.cairo next to Address
2. create case in args_gen.py ("ethereum", "cancun", "fork_types", "SetAddress"): Set[Address],
3. create test case in test_serde.py