tests(app): rename test

https://github.com/penumbra-zone/penumbra/pull/4001/files#r1527343587

crates/core/app/tests/mock_consensus_staking.rs

@@ -21,7 +21,7 @@ use {
 mod common;
 
 #[tokio::test]
-async fn mock_consensus_can_delegate_to_a_validator() -> anyhow::Result<()> {
+async fn mock_consensus_can_define_and_delegate_to_a_validator() -> anyhow::Result<()> {
  // Install a test logger, acquire some temporary storage, and start the test node.
  let guard = common::set_tracing_subscriber();
  let storage = TempStorage::new().await?;