Only stop processes belong to the current user

[secfree]

What changes are proposed in this pull request?

Only stop processes belong to the current user while running ./bin/alluxio process start or ./bin/alluxio process stop

Why are the changes needed?

Without this PR, it will try to stop all processes match the class name even they are not started by the current user. Like the below case

$ ./bin/alluxio process stop local
WARN[2023-09-21T14:57:31+08:00] No process to stop because could not find running process matching alluxio.worker.AlluxioWorker
INFO[2023-09-21T14:57:31+08:00] Found 1 running process(es) matching alluxio.master.AlluxioMaster
INFO[2023-09-21T14:57:31+08:00] Successfully killed 0 process(es)
ERRO[2023-09-21T14:57:31+08:00] Failed to kill 1 process(es):
ERRO[2023-09-21T14:57:31+08:00] Failed to kill process: error sending TERM signal to process for alluxio.master.AlluxioMaster with pid 17055
 --- at /tmp/alluxio1717887242/cli/src/alluxio.org/cli/env/process.go:175 (BaseProcess.Stop.func1) ---
Caused by: operation not permitted

Does this PR introduce any user facing changes?

NO

[Xenorith]

alluxio-bot, merge this please