Fix span name for HTTPClient calls

[marctc]

We are generating metrics like:

traces_spanmetrics_latency_count{source="beyla",span_kind="SPAN_KIND_CLIENT",span_name="GET",status_code="0"} 390

missing the route information in span name. This PR fixes this issue

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 34.10%. Comparing base (e766187) to head (f4c2ca6).
Report is 10 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (e766187) and HEAD (f4c2ca6). Click for more details.

HEAD has 2 uploads less than BASE

Flag	BASE (e766187)	HEAD (f4c2ca6)
unittests	1	0
k8s-integration-test	1	0

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1244       +/-   ##
===========================================
- Coverage   78.35%   34.10%   -44.25%     
===========================================
  Files         145      142        -3     
  Lines       14639    14560       -79     
===========================================
- Hits        11470     4966     -6504     
- Misses       2570     9152     +6582     
+ Partials      599      442      -157     

Flag	Coverage Δ
k8s-integration-test	?
oats-test	34.10% <100.00%> (-0.25%)	⬇️
unittests	?

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[grcevski]

LGTM! I guess we may need to adjust bunch of tests for this to pass.

[grcevski]

Ah right, I guess now multiple spans will match with the same URL path. I think we need to extend FindOperationByName to use an optional parameter which is the span kind and look for the server span. Otherwise many other tests will have an issue.