FIR2IR: use lookupTag or class to getLocalClass, not classId

Before this commit, we sometimes tried to fetch anonymous object by id,
getting sometimes a wrong result because it's singleton.
Now we use lookupTag or FIR class itself instead.

#KT-44050 Fixed

compiler/tests-gen/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java

@@ -19884,6 +19884,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
             runTest("compiler/testData/codegen/box/objects/useAnonymousObjectAsIterator.kt");
         }
 
+        @TestMetadata("useAnonymousObjectFunction.kt")
+        public void testUseAnonymousObjectFunction() throws Exception {
+            runTest("compiler/testData/codegen/box/objects/useAnonymousObjectFunction.kt");
+        }
+
         @TestMetadata("useImportedMember.kt")
         public void testUseImportedMember() throws Exception {
             runTest("compiler/testData/codegen/box/objects/useImportedMember.kt");