TrickOps: Update send_hs.py to match latest send_hs output Trick produces

[ddj116]

Background

In the time since utility python module share/trick/trickops/send_hs.py was added to TrickOps (3/2023), Trick has moved on to a different output in the send_hs file that gets created, so this utility module is currently broken in the latest state of master. When I originally added send_hs.py it was not added with unit testing, so it's break was never discovered by Trick's CI.

What this issue will address

In this issue I will update send_hs.py to work with the latest output and add a unit test to cover it's usage, something I should have done in the first place!

What we use it for

For the curious, we use this module to help us get send_hs data into a format we can more easily plot in our CI system. For example, here's one such plot showing us how our realtime performance ratio changes over time, where the x-axis is CI job number. It's a nice way for us to see if anything comes into our production branches that significantly affect realtime performance.

Each colored line represents one of our Orion scenarios we continually test in CI. Happy to provide more details on the plot if anyone in the community is interested in the details.

FYI @sharmeye @jmpenn @hchen99 for awareness