Add -X argument to disable generation of @SourceDebugExtension

This will be used in tests in the subsequent commit.

plugins/kotlinx-serialization/kotlinx-serialization.backend/src/org/jetbrains/kotlinx/serialization/compiler/backend/jvm/JVMCodegenUtil.kt

@@ -762,7 +762,7 @@ internal fun createSingletonLambda(
     }
 
     writeSyntheticClassMetadata(lambdaClassBuilder, lambdaCodegen.state, false)
-    lambdaClassBuilder.done()
+    lambdaClassBuilder.done(lambdaCodegen.state.generateSmapCopyToAnnotation)
 
     return lambdaType
 }