fix(process): reap entire process group on cmd.Cancel (#39143)

Signed-off-by: Royce Remer <royceremer@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

modules/ssh/ssh.go

@@ -75,7 +75,7 @@ func sessionHandler(session *sshSession) int {
 		}
 	}
 
-	cmd := exec.CommandContext(ctx, setting.AppPath, args...)
+	cmd := process.CommandContext(ctx, setting.AppPath, args...)
 	cmd.Env = append(
 		os.Environ(),
 		"SSH_ORIGINAL_COMMAND="+session.rawCmd,
@@ -104,8 +104,6 @@ func sessionHandler(session *sshSession) int {
 	}
 	defer stdin.Close()
 
-	process.SetSysProcAttribute(cmd)
-
 	wg := &sync.WaitGroup{}
 
 	if err = cmd.Start(); err != nil {