[ASP.NET Core] Remove http.host and add net.host.name and net.host.port

[vishweshbankwar]

Towards #3373

Changes

Spec: 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 #3858 (f3f1516) into main (e0d8737) will increase coverage by 0.01%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3858      +/-   ##
==========================================
+ Coverage   87.33%   87.34%   +0.01%     
==========================================
  Files         279      279              
  Lines       10810    10811       +1     
==========================================
+ Hits         9441     9443       +2     
+ Misses       1369     1368       -1     

Impacted Files	Coverage Δ
...tation.AspNetCore/Implementation/HttpInListener.cs	90.30% <100.00%> (+0.05%)	⬆️
...ZPages/Implementation/ZPagesExporterEventSource.cs	62.50% <0.00%> (+6.25%)	⬆️