Divorce the runtime from FeeCalculator (#20737)

core/src/test_validator.rs

@@ -636,6 +636,7 @@ impl TestValidator {
 
     /// Return an RpcClient for the validator.  As a convenience, also return a recent blockhash and
     /// associated fee calculator
+    #[deprecated(since = "1.9.0", note = "Please use `get_rpc_client` instead")]
     pub fn rpc_client(&self) -> (RpcClient, Hash, FeeCalculator) {
         let rpc_client =
             RpcClient::new_with_commitment(self.rpc_url.clone(), CommitmentConfig::processed());
@@ -647,6 +648,11 @@ impl TestValidator {
         (rpc_client, recent_blockhash, fee_calculator)
     }
 
+    /// Return an RpcClient for the validator.
+    pub fn get_rpc_client(&self) -> RpcClient {
+        RpcClient::new_with_commitment(self.rpc_url.clone(), CommitmentConfig::processed())
+    }
+
     pub fn join(mut self) {
         if let Some(validator) = self.validator.take() {
             validator.join();