Adds skeleton performance test framework

[nickschuch]

Overview

Adds a performance testing framework so that we can test the effects of adding new spans to our library.

Implementation

• Adds a basic k6 scenario for performance testing. Contains cache breaking functionality.
• Adds a toggle to Docker Compose so that we can disable OpenTelemetry.
• Adds a Github Actions workflow for executing 2 tests:
  • A baseline test without OpenTelemetry enabled
  • One with OpenTelemetry enabled
• Adds a script for reviewing the tests. Is responsible for:
  • Checking our tests did not have any errors
  • If our OpenTelemetry implementation operates within a specific budget. Starting with 200ms.
• Adds Github comment to see data

[github-actions]

Performance Data

Before = 69ms | After = 216ms | Difference = 147ms