[Stubs] Pass proper container source to stub-based FIR declarations

Backend, which is used by the expression evaluator, relies on the class
name in 'FacadeClassSource'. To pass the correct JVM class name,
stubs for top-level functions and properties got the 'origin'.

analysis/decompiled/decompiler-to-stubs/src/org/jetbrains/kotlin/analysis/decompiler/stub/CallableClsStubBuilder.kt

@@ -208,7 +208,8 @@ private class FunctionClsStubBuilder(
             mayHaveContract = hasContract,
             runIf(hasContract) {
                 ClsContractBuilder(c, typeStubBuilder).loadContract(functionProto)
-            }
+            },
+            origin = createStubOrigin(protoContainer)
         )
     }
 }
@@ -280,7 +281,8 @@ private class PropertyClsStubBuilder(
             isExtension = propertyProto.hasReceiver(),
             hasReturnTypeRef = true,
             fqName = c.containerFqName.child(callableName),
-            initializer
+            initializer,
+            origin = createStubOrigin(protoContainer)
         )
     }
 

analysis/decompiled/decompiler-to-stubs/src/org/jetbrains/kotlin/analysis/decompiler/stub/clsStubBuilding.kt

@@ -9,6 +9,7 @@ import org.jetbrains.kotlin.analysis.decompiler.stub.flags.FlagsToModifiers
 import org.jetbrains.kotlin.builtins.StandardNames
 import org.jetbrains.kotlin.descriptors.SourceElement
 import org.jetbrains.kotlin.lexer.KtModifierKeywordToken
+import org.jetbrains.kotlin.load.kotlin.FacadeClassSource
 import org.jetbrains.kotlin.load.kotlin.JvmPackagePartSource
 import org.jetbrains.kotlin.load.kotlin.KotlinJvmBinaryClass
 import org.jetbrains.kotlin.load.kotlin.header.KotlinClassHeader
@@ -221,6 +222,23 @@ fun createTargetedAnnotationStubs(
     }
 }
 
+internal fun createStubOrigin(protoContainer: ProtoContainer): KotlinStubOrigin? {
+    if (protoContainer is ProtoContainer.Package) {
+        val source = protoContainer.source
+        if (source is FacadeClassSource) {
+            val className = source.className.internalName
+            val facadeClassName = source.facadeClassName?.internalName
+            if (facadeClassName != null) {
+                return KotlinStubOrigin.MultiFileFacade(className, facadeClassName)
+            }
+
+            return KotlinStubOrigin.Facade(className)
+        }
+    }
+
+    return null
+}
+
 val MessageLite.annotatedCallableKind: AnnotatedCallableKind
     get() = when (this) {
         is ProtoBuf.Property -> AnnotatedCallableKind.PROPERTY