OPNSense/core 00ef33bsrc/opnsense/scripts/interfaces list_arp.py list_ndp.py

python3: replace subprocess.call in src/opnsense/scripts/interfaces/* for https://github.com/opnsense/core/issues/3574

(cherry picked from commit 2f69282b2865c46de16b2af9861485c5e110b2d8)
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+18-23src/opnsense/scripts/interfaces/list_arp.py
+15-21src/opnsense/scripts/interfaces/list_ndp.py
+33-442 files

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