E2SAR-0.3.1-main-ubuntu-22.04: V0.3.1 wip (#163)

- Reversed the order of removing senders and shutting down send threads
in e2sar_perf to ensure no losses occur due to premature de-listing of
the sender IP in LB
- Fixed multiple memory leaks in segmenter and reassembler
- Fixed proper handling of `-v/--novalidate` flag in lbadm
- Added 'Zero-to-Hero' scripts that show how to do performance testing
on Perlmutter (located in scripts/zero_to_hero). The scripts exercise
the wide variety of E2SAR tools and show how they can be integrated into
Slurm workflows.