feat: improve tracing documentation

[iverly]

The pull request aims to enhance documentation, make it less hydra-specific, and add support for OpenTelemetry as a provider.

Related Issue or Design Document

#371

Checklist

• I have read the contributing guidelines and signed the CLA.
• I have referenced an issue containing the design document if my change introduces a new feature.
• I have read the security policy.
• I confirm that this pull request does not address a security vulnerability.
  If this pull request addresses a security vulnerability,
  I confirm that I got approval (please contact [email protected]) from the maintainers to push the changes.
• I have added tests that prove my fix is effective or that my feature works.
• I have added the necessary documentation within the code base (if appropriate).

Further comments

N/A

[vinckr]

Love it, thanks a lot for the contribution!