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Draft: tracing: Migrate from OpenTracing to OpenTelemetry

Quang-Minh Nguyenrequested to merge
qmnguyen0711/replace-opentracing-by-opentelemetry into master

What does this MR do and why?

tracing: Migrate from OpenTracing to OpenTelemetry

This major refactoring migrates our tracing infrastructure from the deprecated OpenTracing framework to the modern OpenTelemetry standard. OpenTelemetry has become the industry standard for observability and provides better interoperability with monitoring systems. The migration includes:

  • Replacing OpenTracing spans with OpenTelemetry equivalents
  • Updating span creation, attribute setting, and context propagation
  • Converting .Finish() calls to .End()
  • Modernizing the testing infrastructure to use OpenTelemetry exporters
  • Removing dependencies on Jaeger client libraries
  • Ensuring backward compatibility with existing tracing workflow

This change maintains our current observability capabilities while positioning us to take advantage of the richer feature set and broader ecosystem support of OpenTelemetry.

NOTE: This commit does break GITLAB_TRACING environment variable. Labkit's tracing utility configures the tracing environment using that varibale. Upcoming commits will address this issue.

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