[ zombie dumpcap processes] dumpcap processes cannot be killed properly by capture.close_async when using multiple live captures concurrently.

[amo1101]

Describe the bug
dumpcap processes cannot be killed properly when multiple live captures are used concurrently.

To Reproduce

1. use the attached test.py (change testpy.text to test.py) to reproduce.
2. test with 1 live capture, i.e., run_test(1), see test.py, all tshark and dumpcap processes are closed properly
3. test with multiple live captures, e.g., run_test(5), zombie dumpcap processes are generated.

Error Log
2024-09-23 18:18:29,492 - AsyncLiveCapture - DEBUG - Cleanup Subprocess (pid 507395)
2024-09-23 18:18:29,542 - AsyncLiveCapture - DEBUG - sniff finalized.
2024-09-23 18:18:29,543 - AsyncLiveCapture - DEBUG - Cleanup Subprocess (pid 507291)
2024-09-23 18:18:30,310 - AsyncLiveCapture - DEBUG - Waiting for process to close failed, may have zombie process.

Expected behavior
All tshark and dumpcap processed should be killed properly.

Versions (please complete the following information):

• OS: Ubuntu Oracular Oriole 24.10
• pyshark version: 0.6.1
• tshark version: 4.2.6

Example pcap / packet

• use attached test.py for reproduction
  errorlog.txt
  testpy.txt