improve efficiency of Suricata processing uploaded PCAP files

[mmguero]

@mmguero cloned issue idaholab/Malcolm#325 on 2024-01-08:

Currently as uploaded PCAP files are processed, each PCAP file results in a new suricata process for that PCAP file.

This is the same behavior for Zeek and Arkime capture; however, suricata seems to have more overhead (I often notice that suricata is still running on a batch of uploaded PCAP files long after the others are done).

I came across this thread describing using suricata socket control to send PCAP files to a single long-running suricata process, then output each eve.json to a different directory per-PCAP. This would be an improvement.