add option to test nonPublicApi #216

Job	Run time
Build .Net projects (samples/client/petstore/csharp/generichost/latest/ComposedEnum)	31s
Build .Net projects (samples/client/petstore/csharp/generichost/latest/Tags)	28s
Build .Net projects (samples/client/petstore/csharp/generichost/latest/InlineEnumAnyOf)	30s
Build .Net projects (samples/client/petstore/csharp/generichost/net9/AnyOf)	32s
Build .Net projects (samples/client/petstore/csharp/generichost/latest/HelloWorld)	30s
Build .Net projects (samples/client/petstore/csharp/generichost/net9/NullReferenceTypes)	35s
Build .Net projects (samples/client/petstore/csharp/generichost/net9/Petstore)	36s
Build .Net projects (samples/client/petstore/csharp/generichost/net9/AllOf)	33s
Build .Net projects (samples/client/petstore/csharp/generichost/net9/FormModels)	37s
Build .Net projects (samples/client/petstore/csharp/generichost/net9/SourceGeneration)	41s
Build .Net projects (samples/client/petstore/csharp/httpclient/net9/Petstore-nonPublicApi)	26s
Build .Net projects (samples/client/petstore/csharp/generichost/net9/AnyOfNoCompare)	29s
Build .Net projects (samples/client/petstore/csharp/generichost/net9/UseDateTimeForDate)	30s
Build .Net projects (samples/client/petstore/csharp/generichost/latest/OneOfList)	31s
Build .Net projects (samples/client/petstore/csharp/generichost/net9/OneOf)	30s
Build .Net projects (samples/client/petstore/csharp/httpclient/net9/Petstore)	32s
Build .Net projects (samples/client/petstore/csharp/restsharp/net9/EnumMappings)	30s
	9m 1s

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