feat: add Hash,[Partial]Eq to test utils

This is useful for aggregator objects that want to keep track (via
hashmap) of the number of contracts initialized inside a test.

In particular, a soon-to-be-added TransactionGenerator object will use
this.

crates/blockifier/src/test_utils.rs

@@ -47,7 +47,7 @@ pub const TEST_ERC20_CONTRACT_CLASS_HASH: &str = "0x1010";
 pub const ERC20_CONTRACT_PATH: &str = "./ERC20/ERC20_Cairo0/ERC20_without_some_syscalls/ERC20/\
                                        erc20_contract_without_some_syscalls_compiled.json";
 
-#[derive(Clone, Copy, Debug)]
+#[derive(Clone, Hash, PartialEq, Eq, Copy, Debug)]
 pub enum CairoVersion {
     Cairo0,
     Cairo1,

crates/blockifier/src/test_utils/contracts.rs

@@ -63,7 +63,7 @@ const ERC20_CAIRO1_CONTRACT_PATH: &str = "./ERC20/ERC20_Cairo1/erc20.casm.json";
 
 /// Enum representing all feature contracts.
 /// The contracts that are implemented in both Cairo versions include a version field.
-#[derive(Clone, Copy, Debug, EnumIter)]
+#[derive(Clone, Hash, PartialEq, Eq, Copy, Debug, EnumIter)]
 pub enum FeatureContract {
     AccountWithLongValidate(CairoVersion),
     AccountWithoutValidations(CairoVersion),