Restore create_devnet_client_fork_mode

Author: franciszekjob

starknet_py/tests/e2e/tests_on_networks/client_devnet/fixtures/clients.py

@@ -6,3 +6,8 @@
 @pytest.fixture(name="devnet_client", scope="package")
 def create_devnet_client(devnet) -> DevnetClient:
     return DevnetClient(node_url=devnet + "/rpc")
+
+
+@pytest.fixture(name="devnet_client_fork_mode", scope="package")
+def create_devnet_client_fork_mode(devnet_forking_mode) -> DevnetClient:
+    return DevnetClient(node_url=devnet_forking_mode + "/rpc")