OTEL Outgoing Dependencies Issue in ESM Environments

[swapnil-nagar]

This PR addresses a critical issue reported by a customer where outgoing dependencies were not being correctly instrumented in ESM-based Azure Functions apps.

Key Changes

• Introduced a new class specifically designed to support ESM modules.

Reason: The existing code path is not compatible with ESM, and this workaround is currently the only approach that resolves the issue for the customer.

• The implementation is isolated and non-breaking for CommonJS users.

Notes
This ESM-specific class is intended as a temporary solution. Once the upstream @opentelemetry library provides first-class support for ESM, we plan to retire this workaround in the next major release.

Please review the new class and method and share feedback on naming, structure, or messaging as appropriate.

Next Steps

• After this PR is merged:
• A new version of the azure-functions-nodejs-opentelemetry package will be published.
• Sample apps demonstrating this fix will be updated and shared.