fix(server): fix span-naming and empty-attributes rules

[jorgeepc]

This PR fixes a bug with the span-naming and empty-attributes rules in the trace analyzer. We were throwing analyzer errors about span naming problems for default http spans, and empty tracetest.span.status_description attributes.

Changes

• add default validation for http spans
• include the tracetest.span.status_description attribute if it has a value

Fixes

• fixes https://github.com/kubeshop/tracetest-cloud/issues/265

Checklist

• tested locally
• added new dependencies
• updated the docs
• added a test

Loom video

https://www.loom.com/share/94b6587e7b584f228b9fa6477af4217f?sid=55b817a3-28f5-48b6-86e2-024d96246b7e

[codecov]

Codecov Report

Attention: 6 lines in your changes are missing coverage. Please review.

Comparison is base (83bb2f1) 39.43% compared to head (ca534a7) 39.43%.

Files	Patch %	Lines
server/traces/span_entitiess.go	0.00%	4 Missing ⚠️
server/linter/rules/ensure_span_naming_rule.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3403      +/-   ##
==========================================
- Coverage   39.43%   39.43%   -0.01%     
==========================================
  Files         222      222              
  Lines       16973    16974       +1     
==========================================
  Hits         6694     6694              
- Misses       9693     9694       +1     
  Partials      586      586              

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