feat(op): add opentelemetry to token endpoint

[muhlemmer]

This changeadd opentelemetry to op, for the oauth/token endpoint.

Definition of Ready

• I am happy with the code
• Short description of the feature/issue is added in the pr description
• PR is linked to the corresponding user story
• Acceptance criteria are met
• All open todos and follow ups are defined in a new ticket and justified
• Deviations from the acceptance criteria and design are agreed with the PO and documented.
• No debug or dead code
• My code has no repetitions
• Critical parts are tested automatically
• Where possible E2E tests are implemented
• Documentation/examples are up-to-date
• All non-functional requirements are met
• Functionality of the acceptance criteria is checked manually on the dev system.

[codecov]

Codecov Report

Merging #436 (ad3fc30) into main (5ade1cd) will increase coverage by 0.50%.
The diff coverage is 88.23%.

@@            Coverage Diff             @@
##             main     #436      +/-   ##
==========================================
+ Coverage   53.29%   53.79%   +0.50%     
==========================================
  Files          74       74              
  Lines        5727     5811      +84     
==========================================
+ Hits         3052     3126      +74     
- Misses       2415     2425      +10     
  Partials      260      260              

Files Changed	Coverage Δ
pkg/op/auth_request.go	56.96% <0.00%> (-0.59%)	⬇️
pkg/op/token_jwt_profile.go	20.25% <57.14%> (+3.58%)	⬆️
pkg/op/token_request.go	61.46% <72.72%> (+0.86%)	⬆️
pkg/op/device.go	72.19% <100.00%> (+0.60%)	⬆️
pkg/op/op.go	63.45% <100.00%> (+0.29%)	⬆️
pkg/op/token.go	69.94% <100.00%> (+2.64%)	⬆️
pkg/op/token_client_credentials.go	51.19% <100.00%> (+8.93%)	⬆️
pkg/op/token_code.go	44.79% <100.00%> (+8.64%)	⬆️
pkg/op/token_exchange.go	52.11% <100.00%> (+0.82%)	⬆️
pkg/op/token_refresh.go	45.54% <100.00%> (+5.98%)	⬆️
... and 1 more

[github-actions]

🎉 This PR is included in version 2.10.0 🎉

The release is available on GitHub release

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