Fix to Unreal tests to stop requesting infinite resources (#3504)

# Description of Changes

For core dumps Unreal tries to use setrlimit() for infinity when setting
resource limits, it seems this becomes an issue intermittently when
running tests in parallel. There is an option when running Unreal to
disable this and we can rely on error longs only which makes sense for
CI imo.

# API and ABI breaking changes

None

# Expected complexity level and risk

1 - small flag change

# Testing

- [x] Re-ran all tests locally

Author: JasonAtClockwork

sdks/unreal/tests/test.rs

@@ -86,7 +86,7 @@ fn make_test(test_name: &str) -> Test {
 		// Updated to -NoZen and -dcc=InstalledNoZenLocalFallback to stop Unreal from trying to install Zen Server in CI
 		// This is failing during tests as each test tries to install Zen and create a race condition where two tests try to handle this at the same time
 		// Zen Server and the Derived Cache seem like a good idea during tests but they were not designed with mutli-threaded tests in mind, it is suggested to allow each test to run in isolation
-        "\"{editor_exe}\" \"{uproject_path}\" -NullRHI -Unattended -NoSound -nop4 -NoSplash -NoZen -ddc=InstalledNoZenLocalFallback -ExecCmds=\"Automation RunTests SpacetimeDB.TestClient.{test_name}; Quit\""
+        "\"{editor_exe}\" \"{uproject_path}\" -NullRHI -Unattended -NoSound -nop4 -NoSplash -NoZen -ddc=InstalledNoZenLocalFallback -nocore -ExecCmds=\"Automation RunTests SpacetimeDB.TestClient.{test_name}; Quit\""
     );
 
     Test::builder()