Generate classes in MultifileClassCodegen exactly the same as in PackageCodegen

Two known issues with generateNonPartClassDeclarations that was here
before were the fact that we didn't sort sealed classes and its
subclasses which led to NoSuchMethodError (KT-27097), and the fact that
we didn't skip expect classes which led to incorrect duplicate JVM class
name diagnostic (KT-30843)

 #KT-27097 Fixed
 #KT-30843 Fixed

compiler/light-classes/src/org/jetbrains/kotlin/asJava/builder/LightClassDataProvider.kt

@@ -27,6 +27,7 @@ import org.jetbrains.kotlin.asJava.KotlinAsJavaSupport
 import org.jetbrains.kotlin.asJava.LightClassGenerationSupport
 import org.jetbrains.kotlin.asJava.classes.getOutermostClassOrObject
 import org.jetbrains.kotlin.codegen.CompilationErrorHandler
+import org.jetbrains.kotlin.codegen.MemberCodegen
 import org.jetbrains.kotlin.codegen.state.GenerationState
 import org.jetbrains.kotlin.fileClasses.JvmFileClassUtil
 import org.jetbrains.kotlin.name.FqName
@@ -48,7 +49,7 @@ class LightClassDataProviderForClassOrObject(
                 val packageCodegen = state.factory.forPackage(packageFqName, files)
                 val packagePartType = Type.getObjectType(JvmFileClassUtil.getFileClassInternalName(file))
                 val context = state.rootContext.intoPackagePart(packageCodegen.packageFragment, packagePartType, file)
-                packageCodegen.generateClassOrObject(getOutermostClassOrObject(classOrObject), context)
+                MemberCodegen.genClassOrObject(context, getOutermostClassOrObject(classOrObject), state, null)
                 state.factory.done()
             }
         }