feat(tracing): added tracing middleware

[flc1125]

The tracing middleware provides a way to trace the execution of a request through the application. It is based on the OpenTelemetry standard and can be used with any tracer that implements this standard.

The package is forked from tracing and optimized on this basis. Thanks to the original author for his contribution.

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Change items:

1. Upgraded the semconv specification from 1.4.0 to 1.26.0
2. Supplemented some attribute information

[codecov]

Codecov Report

Attention: Patch coverage is 97.64151% with 5 lines in your changes missing coverage. Please review.

Project coverage is 76.19%. Comparing base (e2a4fa0) to head (d5ae49a).
Report is 2 commits behind head on 2.x.

Files with missing lines	Patch %	Lines
middleware/tracing/tracing.go	92.30%	3 Missing ⚠️
middleware/tracing/span.go	98.05%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              2.x     #327      +/-   ##
==========================================
+ Coverage   74.81%   76.19%   +1.38%     
==========================================
  Files         102      107       +5     
  Lines        3291     3503     +212     
==========================================
+ Hits         2462     2669     +207     
- Misses        754      758       +4     
- Partials       75       76       +1     

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