[Integ-tests] Use right permission to operate on log files

In many of the operating systems ParallelCluster supported, `root` user could bypass any files permissions. However, with RHEL9 and Rocky9, `root` user could not bypass files permissions by default. Therefore, this commit improves integration tests to operate on files with the owner users of the files

Signed-off-by: Hanwen <hanwenli@amazon.com>

Author: hanwen-cluster

tests/integration-tests/tests/basic/log_rotation_utils.py

@@ -179,9 +179,11 @@ def _test_logs_uploaded_to_cloudwatch(
     # write a log message to log file after log rotation in case log is empty
     for log in logs:
         if log.get("existence"):
+            log_path = log.get("log_path")
+            log_file_user = remote_command_executor.get_user_to_operate_on_file(log_path)
             _run_command_on_node(
                 remote_command_executor,
-                f"echo '{after_log_rotation_message}' | sudo tee --append {log.get('log_path')}",
+                f"echo '{after_log_rotation_message}' | sudo -u {log_file_user} tee --append {log_path}",
                 compute_private_ip,
             )
             # assert both logs are in the cloudwatch logs