[Utility] Add e2e testing for servicer and trustless relays

[adshmh]

Objective

Using e2e/tests/root.feature as a guideline, add e2e test descriptions and code for trustless relays in particular, and servicer in general.

Origin Document

Part of work on #754

Goals

Cover the behavior of servicer, more specifically trustless relays, using e2e tests.

Deliverable

• [ ] A new .feature file with the description of all e2e scenarios for trustless relays and and other servicer operations
• [ ] Required code to add and run e2e tests described above.
• [ ] Any required support for running the new e2e tests
• [ ] Updated documentation on behavior captured by e2e tests: specifically for any behavior that would need context to explain.

Non-goals / Non-deliverables

• Changes to the business logic of E2E relays

General issue deliverables

• [ ] Update any relevant local/global README(s)
• [ ] Update relevant source code tree explanations
• [ ] Add or update any relevant or supporting mermaid diagrams

Testing Methodology

• [ ] Task specific tests or benchmarks: make ...
• [ ] New tests or benchmarks: make ...
• [ ] All tests: make test_all
• [ ] LocalNet: verify a LocalNet is still functioning correctly by following the instructions at docs/development/README.md
• [ ] k8s LocalNet: verify a k8s LocalNet is still functioning correctly by following the instructions here

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Creator: @adshmh Co-Owners: @Olshansk

[Olshansk]

@adshmh A couple nits regarding formatting. I have added red arrows to things that I updated but would appreciate if you can do so yourself in the future. Ty!

[adshmh]

@adshmh A couple nits regarding formatting. I have added red arrows to things that I updated but would appreciate if you can do so yourself in the future. Ty!

Noted and will do. Thank you.