telemetry(amazonq): Add status field to unit test generation telemetry for tracking user actions

[laileni-aws]

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Problem

• The current unit test generation telemetry event lacks a field to distinguish between user actions: acceptance, rejection, failure, or cancellation.

Solution

• Enhancing the amazonq_utgGenerateTests telemetry event by incorporating a status field to capture user actions in toolkit metrics.

Checklist

• My code follows the code style of this project
• I have added tests to cover my changes
• A short description of the change has been added to the CHANGELOG if the change is customer-facing in the IDE.
• I have added metrics for my changes (if required)

License

I confirm that my contribution is made under the terms of the Apache 2.0 license.