add test account with dummy validate

crates/katana/contracts/account_with_dummy_validate.cairo

@@ -0,0 +1,53 @@
+#[starknet::contract]
+mod Account {
+    use array::{ArrayTrait, SpanTrait};
+    use starknet::{ContractAddress, call_contract_syscall};
+    use starknet::info::SyscallResultTrait;
+    use zeroable::Zeroable;
+
+    #[storage]
+    struct Storage {
+    }
+
+    #[external(v0)]
+    fn __validate_deploy__(
+        self: @ContractState,
+        class_hash: felt252,
+        contract_address_salt: felt252
+    ) -> felt252 {
+        starknet::VALIDATED
+    }
+
+    #[external(v0)]
+    fn __validate_declare__(self: @ContractState, class_hash: felt252) -> felt252 {
+        starknet::VALIDATED
+    }
+
+    #[external(v0)]
+    fn __validate__(
+        self: @ContractState,
+        contract_address: ContractAddress,
+        selector: felt252,
+        calldata: Array<felt252>
+    ) -> felt252 {
+        starknet::VALIDATED
+    }
+
+    #[external(v0)]
+    #[raw_output]
+    fn __execute__(
+        self: @ContractState,
+        contract_address: ContractAddress,
+        selector: felt252,
+        calldata: Array<felt252>
+    ) -> Span<felt252> {
+        // Validate caller.
+        assert(starknet::get_caller_address().is_zero(), 'INVALID_CALLER');
+
+        call_contract_syscall(
+            address: contract_address,
+            entry_point_selector: selector,
+            calldata: calldata.span()
+        ).unwrap_syscall()
+    }
+}