feat: avoid duplicate logs in cloudwatch

[bryansray]

But still maintain the OTel handlers.

Rationale

Remove the duplicate logging in CloudWatch, but still maintain the OpenTelemetry handlers.

TODO

• Update CHANGELOG.md
• Add any necessary tests

[Copilot]

Pull Request Overview

This PR modifies the Corva logging system to prevent duplicate log entries in CloudWatch while preserving OpenTelemetry (OTel) log handling functionality. The solution disables log propagation on the CORVA_LOGGER and explicitly attaches OTel handlers when log sending is enabled.

Key changes:

• Disables propagation on CORVA_LOGGER to prevent AWS Lambda root handler duplication
• Adds utility functions to detect and gather OTel handlers from the root logger
• Modifies LoggingContext to explicitly attach OTel handlers when appropriate

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