Add semconv/v1.20.0

[pellared]

Fixes #3988

The changes in httpconv are related to open-telemetry/opentelemetry-specification#3272

[codecov]

Codecov Report

Merging #4078 (1ba7e09) into main (fadd3d6) will increase coverage by 0.5%.
The diff coverage is 100.0%.

❗ Current head 1ba7e09 differs from pull request most recent head 9ae7384. Consider uploading reports for the commit 9ae7384 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #4078     +/-   ##
=======================================
+ Coverage   82.7%   83.3%   +0.5%     
=======================================
  Files        179     181      +2     
  Lines      13498   13934    +436     
=======================================
+ Hits       11176   11616    +440     
+ Misses      2101    2097      -4     
  Partials     221     221             

Impacted Files	Coverage Δ
semconv/internal/v4/http.go	100.0% <100.0%> (ø)
semconv/internal/v4/net.go	100.0% <100.0%> (ø)

... and 2 files with indirect coverage changes

[MrAlias]

What are the main differences between internal/v3 and internal/v4?

[pellared]

What are the main differences between internal/v3 and internal/v4?

Changes related to open-telemetry/opentelemetry-specification#3272