Add Functional Accessibility Checks to CI

[chiaramooney]

Summary

Windows Terminal repo has a PR to add functional accessibility checks in their CI pipelines. We should bring the sample checks over to the E2E test app.

1ES docs
Pipeline Samples

Motivation

Improved accessibility regression testing in our pipelines.

Basic Example

Pipelines should run Fast Pass checks from accessibility insights.

Open Questions

No response

[jonthysell]

@vineethkuttan Can you look into this?