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

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/es6/semantics/IrJsCodegenBoxES6TestGenerated.java

@@ -15939,6 +15939,11 @@ public class IrJsCodegenBoxES6TestGenerated extends AbstractIrJsCodegenBoxES6Tes
             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");

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenBoxTestGenerated.java

@@ -15939,6 +15939,11 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
             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");

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java

@@ -16004,6 +16004,11 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             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");

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/wasm/semantics/IrCodegenBoxWasmTestGenerated.java

@@ -9980,6 +9980,11 @@ public class IrCodegenBoxWasmTestGenerated extends AbstractIrCodegenBoxWasmTest
             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");