[repo] Common.prod.props & csproj cleanup

[CodeBlanch]

Changes

1. Some cleanup of Common.prod.props:

• Removed duplicate GenerateDocumentationFile (it is already part of Common.props)
• Combined some of the PropertyGroups and ItemGroups and reorganized them at the top of the file
• Removed <NoWarn>$(NoWarn),1573,1712</NoWarn> and fixed the one warning that manifested as a result (missing XML docs for a couple parameters in DelegatingOptionsFactory.cs)

2. Some cleanup of csproj files:

• Made sure all linked files are going into Includes\ path

3. Tweaked what [build] Fix more ordering issues with ExposeExperimentalFeatures compiler switch #4832 introduced as far as including shared files based on $(ExposeExperimentalFeatures):

• The previous version ADDED shared files as part of a target (PostResolveExposeExperimentalFeatures). This worked fine more or less but the files were no longer showing in Visual Studio which could cause some confusion. The new version let's the project files add what they want and then the target doing resolution (ResolveExposeExperimentalFeatures) REMOVES them based on the final resolved $(ExposeExperimentalFeatures). This makes the csproj files more readable (debatable) but more importantly restores the files in Visual Studio. This also clears a warning that was showing up about duplicate files being added in OTLP project but I could have fixed it using the old way too.

[codecov]

Codecov Report

Merging #4835 (a29b4df) into main (92cdcc5) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #4835      +/-   ##
==========================================
+ Coverage   83.90%   83.92%   +0.01%     
==========================================
  Files         293      293              
  Lines       12001    12001              
==========================================
+ Hits        10070    10072       +2     
+ Misses       1931     1929       -2     

Files Changed	Coverage
src/Shared/Options/DelegatingOptionsFactory.cs	ø

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