[release/8.0] Enable interceptors implicitly in binder gen nupkg when generator is enabled #91559
  Add this suggestion to a batch that can be applied as a single commit.
  This suggestion is invalid because no changes were made to the code.
  Suggestions cannot be applied while the pull request is closed.
  Suggestions cannot be applied while viewing a subset of changes.
  Only one suggestion per line can be applied in a batch.
  Add this suggestion to a batch that can be applied as a single commit.
  Applying suggestions on deleted lines is not supported.
  You must change the existing code in this line in order to create a valid suggestion.
  Outdated suggestions cannot be applied.
  This suggestion has been applied or marked resolved.
  Suggestions cannot be applied from pending reviews.
  Suggestions cannot be applied on multi-line comments.
  Suggestions cannot be applied while the pull request is queued to merge.
  Suggestion cannot be applied right now. Please check back later.
  
    
  
    
Backport of #91469 to release/8.0
Corresponding web SDK change dotnet/sdk#35024
Customer Impact
The interceptors feature is required for source-gen to work; enable it implicitly on behalf of users NuGet package consumers that enable the generator.
Testing
Tested manually with local app.
Risk
Low: this is a tested update for nuget package impl of an off-by-default component.