Fix module name calculation for test executions whose working dir is outside of project repo (#6235)

Author: nikita-tkachenko-datadog

dd-java-agent/agent-ci-visibility/src/main/java/datadog/trace/civisibility/CiVisibilitySystem.java

@@ -227,7 +227,9 @@ private static TestEventsHandler.Factory testEventsHandlerFactory(
       CIInfo ciInfo = ciProviderInfo.buildCIInfo();
       String repoRoot = ciInfo.getCiWorkspace();
       String moduleName =
-          (repoRoot != null) ? Paths.get(repoRoot).relativize(path).toString() : path.toString();
+          repoRoot != null && path.startsWith(repoRoot)
+              ? Paths.get(repoRoot).relativize(path).toString()
+              : config.getServiceName();
 
       DDTestFrameworkSession testSession =
           sessionFactory.startSession(moduleName, path, component, null);