test(e2e): basic E2Es

[AlonKellner-RedHat]

Summary

E2E tests which check basic GuideLLM functionality, using vLLM simulator.

Details

• Max requests test
• Max duration test
• Over-saturation stopping test - skipped for now, will be enabled when Feat/over saturation stopping #438 lands

Test Plan

• Local testing
• GitHub action

---

• "I certify that all code in this PR is my own, except as noted below."

Use of AI

• Includes AI-assisted code completion
• Includes code generated by an AI application
• Includes AI-generated tests (NOTE: AI written tests should have a docstring that includes ## WRITTEN BY AI ##)

[jaredoconnell]

Looks good overall. It is fairly self-contained, so it shouldn't cause any issues as long as the tests aren't flaky. Just one blocker as discussed in the call.

[sjmonson]

Few small nits

[AlonKellner-RedHat]

@sjmonson I just straight up applied all of your suggestions.
@jaredoconnell I removed the now redundant aiologic dependency, and integrated tox-pdm with all tox based tests.
Anything else you want to tackle before we land this one?

[sjmonson]

One more nit. Also needs signoff, E.g. git rebase --signoff main.