DSR tests for TP aren't run in GHA

[ocket8888]

This Bug Report affects these Traffic Control components:

• Traffic Portal (tests GHA)

Current behavior:

The GitHub Action/workflow for running the Traffic Portal tests currently doesn't run Delivery Service Requests tests - in fact, those tests do not ever run without code changes to the test specs.

Expected behavior:

Nobody runs the TP tests themselves. It's annoying, time-consuming, and resource-intensive. We rely on the GHA to tell us when something breaks. So those tests should all be being run, including the DSR tests.

Steps to reproduce:

Make a change to TP that breaks (only) the DSR tests, then run the TP tests, notice that they do not fail.