K2: prefer base class sources for JVM mapped functions

This commit is a follow-up to 3cb9396b20
"K2: prefer derived class sources for callable copies (e.g. fake overrides)"

#KT-64044 Fixed

analysis/analysis-api/testData/referenceResolve/CollectionStream.kt

@@ -0,0 +1,9 @@
+// ISSUE: KT-64044
+// IGNORE_FE10
+// (stream call is unresolved for some reason)
+// FULL_JDK
+// RENDER_PSI_CLASS_NAME
+
+fun f(collection: Collection<String>) {
+    collection.strea<caret>m()
+}