title: Disabling a specific C# 9 source generator
body: <p>Is there any way to disable a specific C# 9 source generator? Or alternatively disable them all?</p>
  <p>the package in question is <a href="https://github.com/Husqvik/GraphQlClientGenerator#c-9-source-generator" rel="noreferrer">https://github.com/Husqvik/GraphQlClientGenerator#c-9-source-generator</a> which is mean to be able to be used as both a lib and a source generator. but those are mutually exclusive, ie the majority of use cases it make no sense to gen code both by executing code and by code gen</p>