polkadot-test-service: Enable wasmtime feature (#4762)

We use the `Compiled` wasm execution and for that the `wasmtime` needs
to be enabled.

polkadot/node/test/service/src/chain_spec.rs

@@ -32,7 +32,7 @@ const DEFAULT_PROTOCOL_ID: &str = "dot";
 
 /// The `ChainSpec` parameterized for polkadot test runtime.
 pub type PolkadotChainSpec =
-	service::GenericChainSpec<polkadot_test_runtime::GenesisConfig, Extensions>;
+	sc_service::GenericChainSpec<polkadot_test_runtime::GenesisConfig, Extensions>;
 
 /// Local testnet config (multivalidator Alice + Bob)
 pub fn polkadot_local_testnet_config() -> PolkadotChainSpec {

polkadot/node/test/service/src/lib.rs

@@ -41,7 +41,7 @@ use sc_network::{
 	config::{NetworkConfiguration, TransportConfig},
 	multiaddr,
 };
-use service::{
+use sc_service::{
 	config::{DatabaseSource, KeystoreConfig, MultiaddrWithPeerId, WasmExecutionMethod},
 	BasePath, Configuration, KeepBlocks, Role, RpcHandlers, TaskManager, TransactionStorageMode,
 };