[ASP.NET Core] Remove http.url

[vishweshbankwar]

Towards #3373

Changes

http.url is no longer required or recommended attribute for server spans.

https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/trace/semantic_conventions/http.md#http-server-semantic-conventions

For significant contributions please make sure you have completed the following items:

• Appropriate CHANGELOG.md updated for non-trivial changes
• Design discussion issue #
• Changes in public API reviewed

[codecov]

Codecov Report

Merging #3859 (ed75b28) into main (893332e) will decrease coverage by 0.03%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3859      +/-   ##
==========================================
- Coverage   87.46%   87.43%   -0.04%     
==========================================
  Files         280      279       -1     
  Lines       10763    10729      -34     
==========================================
- Hits         9414     9381      -33     
+ Misses       1349     1348       -1     

Impacted Files	Coverage Δ
...tation.AspNetCore/Implementation/HttpInListener.cs	88.40% <ø> (-1.84%)	⬇️
...mentation.Http/HttpClientInstrumentationOptions.cs	100.00% <100.00%> (ø)
...tp/Implementation/HttpHandlerDiagnosticListener.cs	73.68% <100.00%> (ø)
...plementation/HttpWebRequestActivitySource.netfx.cs	80.14% <100.00%> (+0.04%)	⬆️
...umentation.Http/TracerProviderBuilderExtensions.cs	100.00% <100.00%> (ø)
...porter.OpenTelemetryProtocol/OtlpMetricExporter.cs	72.72% <0.00%> (-13.64%)	⬇️
...tation/OpenTelemetryProtocolExporterEventSource.cs	85.00% <0.00%> (-10.00%)	⬇️
...metryProtocol/Implementation/ActivityExtensions.cs	96.21% <0.00%> (+1.08%)	⬆️
...ter.ZPages/Implementation/ZPagesActivityTracker.cs	100.00% <0.00%> (+2.85%)	⬆️
...emetry.Api/Internal/OpenTelemetryApiEventSource.cs	82.35% <0.00%> (+2.94%)	⬆️
... and 2 more

[github-actions]

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[github-actions]

Closed as inactive. Feel free to reopen if this PR is still being worked on.

[prajon84]

@vishweshbankwar : Why this PR was closed? Can this be reopened?