[Extensions.AWS] Remove NuGet reference to System.Net.Http

[wjrogers]

Changes

Remove the reference to System.Net.Http to reduce noise in the NuGet dependency graph.

Including this reference requires restoring all these packages during builds. Most of them are stubs that don't contain binaries. They are not required on any of the supported .NET runtimes. (In fact, this project doesn't reference anything from the System.Net.Http namespace.)

"System.Net.Http": {
  "type": "Transitive",
  "resolved": "4.3.4",
  "contentHash": "aOa2d51SEbmM+H+Csw7yJOuNZoHkrP2XnAurye5HWYgGVVU54YZDvsLUYRv6h18X3sPnjNCANmN7ZhIPiqMcjA==",
  "dependencies": {
    "Microsoft.NETCore.Platforms": "1.1.1",
    "System.Collections": "4.3.0",
    "System.Diagnostics.Debug": "4.3.0",
    "System.Diagnostics.DiagnosticSource": "4.3.0",
    "System.Diagnostics.Tracing": "4.3.0",
    "System.Globalization": "4.3.0",
    "System.Globalization.Extensions": "4.3.0",
    "System.IO": "4.3.0",
    "System.IO.FileSystem": "4.3.0",
    "System.Net.Primitives": "4.3.0",
    "System.Resources.ResourceManager": "4.3.0",
    "System.Runtime": "4.3.0",
    "System.Runtime.Extensions": "4.3.0",
    "System.Runtime.Handles": "4.3.0",
    "System.Runtime.InteropServices": "4.3.0",
    "System.Security.Cryptography.Algorithms": "4.3.0",
    "System.Security.Cryptography.Encoding": "4.3.0",
    "System.Security.Cryptography.OpenSsl": "4.3.0",
    "System.Security.Cryptography.Primitives": "4.3.0",
    "System.Security.Cryptography.X509Certificates": "4.3.0",
    "System.Text.Encoding": "4.3.0",
    "System.Threading": "4.3.0",
    "System.Threading.Tasks": "4.3.0",
    "runtime.native.System": "4.3.0",
    "runtime.native.System.Net.Http": "4.3.0",
    "runtime.native.System.Security.Cryptography.OpenSsl": "4.3.2"
  }
}

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.17%. Comparing base (71655ce) to head (8fff980).
Report is 230 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1713      +/-   ##
==========================================
+ Coverage   73.91%   80.17%   +6.25%     
==========================================
  Files         267      116     -151     
  Lines        9615     3077    -6538     
==========================================
- Hits         7107     2467    -4640     
+ Misses       2508      610    -1898     

Flag	Coverage Δ
unittests-Solution	80.17% <ø> (?)

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see 255 files with indirect coverage changes

[cijothomas]

Tagging owners : @srprash @atshaw43 @ppittle Please review!

[cijothomas]

https:/open-telemetry/opentelemetry-dotnet-contrib/actions/runs/9021608738/job/24789303314?pr=1713#step:2:10 The workflow is broken it seems.

[Kielek]

https:/open-telemetry/opentelemetry-dotnet-contrib/actions/runs/9021608738/job/24789303314?pr=1713#step:2:10 The workflow is broken it seems.

I think the problem is with definition of who is the "collaborator" by the GitHub. I didn't find a way to mark all codeowners as collaborators. I suppose we could change the assign job, to call all code-owners in the comments. It should be always working.