Add regression tests for final expect classes overrides that change modality

KT-61840
Specifically see the comment:
https://youtrack.jetbrains.com/issue/KT-61840/K2-support-changes-in-overrides-of-fake-overrides-of-expect-declarations#focus=Comments-27-8077580.0-0

Review: https://jetbrains.team/p/kt/reviews/12147/timeline

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

@@ -109,6 +109,18 @@ public class FirOldFrontendMPPDiagnosticsWithLightTreeTestGenerated extends Abst
         runTest("compiler/testData/diagnostics/tests/multiplatform/callConflictsOnExpectAndActualWeaklyCompatible.kt");
     }
 
+    @Test
+    @TestMetadata("changeModalityFromOpenToFinalInOverride_finalExpectClass_finalActualClass.kt")
+    public void testChangeModalityFromOpenToFinalInOverride_finalExpectClass_finalActualClass() throws Exception {
+        runTest("compiler/testData/diagnostics/tests/multiplatform/changeModalityFromOpenToFinalInOverride_finalExpectClass_finalActualClass.kt");
+    }
+
+    @Test
+    @TestMetadata("changeModalityFromOpenToFinalInOverride_finalExpectClass_openActualClass.kt")
+    public void testChangeModalityFromOpenToFinalInOverride_finalExpectClass_openActualClass() throws Exception {
+        runTest("compiler/testData/diagnostics/tests/multiplatform/changeModalityFromOpenToFinalInOverride_finalExpectClass_openActualClass.kt");
+    }
+
     @Test
     @TestMetadata("checkNoActualForExpectInLastModule.kt")
     public void testCheckNoActualForExpectInLastModule() throws Exception {

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

@@ -109,6 +109,18 @@ public class FirOldFrontendMPPDiagnosticsWithPsiTestGenerated extends AbstractFi
         runTest("compiler/testData/diagnostics/tests/multiplatform/callConflictsOnExpectAndActualWeaklyCompatible.kt");
     }
 
+    @Test
+    @TestMetadata("changeModalityFromOpenToFinalInOverride_finalExpectClass_finalActualClass.kt")
+    public void testChangeModalityFromOpenToFinalInOverride_finalExpectClass_finalActualClass() throws Exception {
+        runTest("compiler/testData/diagnostics/tests/multiplatform/changeModalityFromOpenToFinalInOverride_finalExpectClass_finalActualClass.kt");
+    }
+
+    @Test
+    @TestMetadata("changeModalityFromOpenToFinalInOverride_finalExpectClass_openActualClass.kt")
+    public void testChangeModalityFromOpenToFinalInOverride_finalExpectClass_openActualClass() throws Exception {
+        runTest("compiler/testData/diagnostics/tests/multiplatform/changeModalityFromOpenToFinalInOverride_finalExpectClass_openActualClass.kt");
+    }
+
     @Test
     @TestMetadata("checkNoActualForExpectInLastModule.kt")
     public void testCheckNoActualForExpectInLastModule() throws Exception {

compiler/testData/diagnostics/tests/multiplatform/changeModalityFromOpenToFinalInOverride_finalExpectClass_finalActualClass.kt

@@ -0,0 +1,16 @@
+// FIR_IDENTICAL
+// MODULE: m1-common
+// FILE: common.kt
+
+open class Base {
+    open fun foo() {}
+}
+
+expect class Foo : Base
+
+// MODULE: m2-jvm()()(m1-common)
+// FILE: jvm.kt
+
+actual class Foo : Base() {
+    final override fun foo() {}
+}

compiler/testData/diagnostics/tests/multiplatform/changeModalityFromOpenToFinalInOverride_finalExpectClass_openActualClass.kt

@@ -0,0 +1,16 @@
+// FIR_IDENTICAL
+// MODULE: m1-common
+// FILE: common.kt
+
+open class Base {
+    open fun foo() {}
+}
+
+expect class Foo : Base
+
+// MODULE: m2-jvm()()(m1-common)
+// FILE: jvm.kt
+
+actual open class Foo : Base() {
+    final override fun foo() {}
+}

compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java

@@ -23476,6 +23476,18 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
                 runTest("compiler/testData/diagnostics/tests/multiplatform/callConflictsOnExpectAndActualWeaklyCompatible.kt");
             }
 
+            @Test
+            @TestMetadata("changeModalityFromOpenToFinalInOverride_finalExpectClass_finalActualClass.kt")
+            public void testChangeModalityFromOpenToFinalInOverride_finalExpectClass_finalActualClass() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/multiplatform/changeModalityFromOpenToFinalInOverride_finalExpectClass_finalActualClass.kt");
+            }
+
+            @Test
+            @TestMetadata("changeModalityFromOpenToFinalInOverride_finalExpectClass_openActualClass.kt")
+            public void testChangeModalityFromOpenToFinalInOverride_finalExpectClass_openActualClass() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/multiplatform/changeModalityFromOpenToFinalInOverride_finalExpectClass_openActualClass.kt");
+            }
+
             @Test
             @TestMetadata("checkNoActualForExpectInLastModule.kt")
             public void testCheckNoActualForExpectInLastModule() throws Exception {