Provide an easy toggle to control if Satellite Assembly generation should be run

[baronfel]

Is your feature request related to a problem? Please describe.

When doing CI non-release builds generating satellite assemblies may not be necessary for some customers, instead taking up compilation time that could be saved. We should provide an easy toggle to skip generating satellite assemblies entirely for builds that are intended for smoke-checking, or other non-production use cases.

Today, skipping Satellite Assembly generation requires a relatively difficult workaround of explicitly setting WithCulture="false" on EmbeddedResource Items based on some user-specified Condition.

Other Techs

• UWP has a concept of a PRIResource that is similar in nature to Resx Satellite Assembly generation - it would be good if a unified hook applied to all per-culture resource generation

[akoeplinger]

Here's an example of the workaround roslyn has to do: https://github.com/dotnet/roslyn/blob/5989ba09c78c7b0934f79db9602dff8424f006fa/eng/targets/DoNotGenerateSatelliteAssemblies_Workaround.targets