feat(docs): opentelemetry tracing

[matoous]

Related issue(s)

• OpenTelemetry support #2597

Checklist

• I have read the contributing guidelines.
• I have referenced an issue containing the design document if my change
  introduces a new feature.
• I am following the
  contributing code guidelines.
• 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 green light (please contact
  security@ory.sh) 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 or changed the documentation.

Further Comments

Fixes the issue of otel not being configurable as the value isn't allowed in providers enum. Also adds docs for otel tracing.

[codecov]

Codecov Report

Merging #2923 (1b6fc10) into master (3236e31) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2923   +/-   ##
=======================================
  Coverage   78.26%   78.26%           
=======================================
  Files         110      110           
  Lines        7731     7731           
=======================================
  Hits         6051     6051           
  Misses       1265     1265           
  Partials      415      415           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3236e31...1b6fc10. Read the comment docs.

[aeneasr]

Awesome, thank you for your contribution! This looks pretty good and I have some ideas how to improve it further :)

[vinckr]

Hello @matoous
Congrats on merging your first PR in Ory 🎉 !
Your contribution will soon be helping secure millions of identities around the globe 🌏.
As a small token of appreciation we send all our first time contributors a gift package to welcome them to the community.
Please drop me an email to claim your Ory swag!