Replace DeterministicExecutor::reset with forbid_parking

There's really no point calling reset if we plan on parking afterwards.

Co-Authored-By: Max Brunsfeld <maxbrunsfeld@gmail.com>

server/src/tests.rs

@@ -523,8 +523,6 @@ impl TestServer {
             .await
             .unwrap();
 
-        // Reset the executor because running SQL queries has a non-deterministic impact on it.
-        cx.foreground().reset();
         client
     }