[FIR] Remove a hack about local classes

^KT-54390 Fixed

compiler/fir/analysis-tests/legacy-fir-tests/tests-gen/org/jetbrains/kotlin/fir/LazyBodyIsNotTouchedTestGenerated.java

@@ -444,6 +444,11 @@ public class LazyBodyIsNotTouchedTestGenerated extends AbstractLazyBodyIsNotTouc
         runTest("compiler/fir/analysis-tests/testData/resolve/problems2.kt");
     }
 
+    @TestMetadata("properLocalPackages.kt")
+    public void testProperLocalPackages() throws Exception {
+        runTest("compiler/fir/analysis-tests/testData/resolve/properLocalPackages.kt");
+    }
+
     @TestMetadata("propertyFromJavaPlusAssign.kt")
     public void testPropertyFromJavaPlusAssign() throws Exception {
         runTest("compiler/fir/analysis-tests/testData/resolve/propertyFromJavaPlusAssign.kt");

compiler/fir/analysis-tests/testData/resolve/properLocalPackages.fir.txt

@@ -0,0 +1,57 @@
+FILE: properLocalPackages.kt
+    package a.b
+
+    public final class X : R|kotlin/Any| {
+        public constructor(): R|a/b/X| {
+            super<R|kotlin/Any|>()
+        }
+
+        public final fun foo(): R|kotlin/Unit| {
+            local final class U : R|kotlin/Any| {
+                public constructor(): R|<local>/U| {
+                    super<R|kotlin/Any|>()
+                }
+
+                local final inner class K : R|kotlin/Any| {
+                    public <local>/U.constructor(): R|<local>/U.K| {
+                        super<R|kotlin/Any|>()
+                    }
+
+                    local final inner class D : R|kotlin/Any| {
+                        public <local>/U.K.constructor(): R|<local>/U.K.D| {
+                            super<R|kotlin/Any|>()
+                        }
+
+                        public final fun check(): R|kotlin/Unit| {
+                            local final class F : R|kotlin/Any| {
+                                public constructor(): R|<local>/F| {
+                                    super<R|kotlin/Any|>()
+                                }
+
+                                local final inner class L : R|kotlin/Any| {
+                                    public <local>/F.constructor(): R|<local>/F.L| {
+                                        super<R|kotlin/Any|>()
+                                    }
+
+                                }
+
+                            }
+
+                        }
+
+                    }
+
+                }
+
+                local final class T : R|kotlin/Any| {
+                    public constructor(): R|<local>/U.T| {
+                        super<R|kotlin/Any|>()
+                    }
+
+                }
+
+            }
+
+        }
+
+    }

compiler/fir/analysis-tests/testData/resolve/properLocalPackages.kt

@@ -0,0 +1,19 @@
+package a.b
+
+class X {
+    fun foo() {
+        class U {
+            inner class K {
+                inner class D {
+                    fun check() {
+                        class F {
+                            inner class L
+                        }
+                    }
+                }
+            }
+
+            <!NESTED_CLASS_NOT_ALLOWED!>class T<!>
+        }
+    }
+}

compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirLightTreeDiagnosticsTestGenerated.java

@@ -524,6 +524,12 @@ public class FirLightTreeDiagnosticsTestGenerated extends AbstractFirLightTreeDi
             runTest("compiler/fir/analysis-tests/testData/resolve/problems2.kt");
         }
 
+        @Test
+        @TestMetadata("properLocalPackages.kt")
+        public void testProperLocalPackages() throws Exception {
+            runTest("compiler/fir/analysis-tests/testData/resolve/properLocalPackages.kt");
+        }
+
         @Test
         @TestMetadata("propertyFromJavaPlusAssign.kt")
         public void testPropertyFromJavaPlusAssign() throws Exception {

compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirPsiDiagnosticTestGenerated.java

@@ -524,6 +524,12 @@ public class FirPsiDiagnosticTestGenerated extends AbstractFirPsiDiagnosticTest
             runTest("compiler/fir/analysis-tests/testData/resolve/problems2.kt");
         }
 
+        @Test
+        @TestMetadata("properLocalPackages.kt")
+        public void testProperLocalPackages() throws Exception {
+            runTest("compiler/fir/analysis-tests/testData/resolve/properLocalPackages.kt");
+        }
+
         @Test
         @TestMetadata("propertyFromJavaPlusAssign.kt")
         public void testPropertyFromJavaPlusAssign() throws Exception {