Otel support

[ahmedmuhsin]

This feature adds a new app setting JAVA_ENABLE_OPENTELEMETRY. When set to true,

• the worker informs the host that it supports otel
• the worker creates a span that wraps each function's execution

The user is responsible for bringing in the exporter libraries. For example:

        <dependency>
            <groupId>io.opentelemetry</groupId>
            <artifactId>opentelemetry-exporter-logging</artifactId>
            <version>1.49.0</version>
        </dependency>
        <dependency>
            <groupId>io.opentelemetry</groupId>
            <artifactId>opentelemetry-exporter-otlp</artifactId>
            <version>1.49.0</version>
        </dependency>

Work Item

https://github.com/Azure/azure-functions-pyfx-planning/issues/708

Pull request checklist

• My changes do not require documentation changes
  • Otherwise: Documentation issue linked to PR
• My changes should not be added to the release notes for the next release
  • Otherwise: I've added my notes to release_notes.md
• My changes do not need to be backported to a previous version
  • Otherwise: Backport tracked by issue/PR #issue_or_pr
• I have added all required tests (Unit tests, E2E tests)

Additional information

Additional PR information