Fix "Create expect function" for primary constructor

#KT-31518 Fixed

idea/src/org/jetbrains/kotlin/idea/quickfix/expectactual/AbstractCreateDeclarationFix.kt

@@ -77,7 +77,12 @@ abstract class AbstractCreateDeclarationFix<D : KtNamedDeclaration>(
                     }
                 }
                 val generatedDeclaration = when {
-                    targetClass != null -> targetClass.addDeclaration(generated as KtNamedDeclaration)
+                    targetClass != null -> {
+                        if (generated is KtPrimaryConstructor && targetClass is KtClass)
+                            targetClass.createPrimaryConstructorIfAbsent().replace(generated)
+                        else
+                            targetClass.addDeclaration(generated as KtNamedDeclaration)
+                    }
                     else -> targetFile.add(generated) as KtElement
                 }
                 val reformatted = CodeStyleManager.getInstance(project).reformat(generatedDeclaration)

idea/testData/multiModuleQuickFix/expectPrimaryConstructor/common/A.after

@@ -0,0 +1 @@
+expect class <caret>A()

idea/testData/multiModuleQuickFix/expectPrimaryConstructor/common/A.kt

@@ -0,0 +1 @@
+expect class A

idea/testData/multiModuleQuickFix/expectPrimaryConstructor/jvm/A.after

@@ -0,0 +1,4 @@
+// "Create expected class in common module testModule_Common" "true"
+// DISABLE-ERRORS
+
+actual class A actual constructor()

idea/testData/multiModuleQuickFix/expectPrimaryConstructor/jvm/A.kt

@@ -0,0 +1,4 @@
+// "Create expected function in common module testModule_Common" "true"
+// DISABLE-ERRORS
+
+actual class A actual <caret>constructor()

idea/tests/org/jetbrains/kotlin/idea/quickfix/QuickFixMultiModuleTestGenerated.java

@@ -434,6 +434,11 @@ public class QuickFixMultiModuleTestGenerated extends AbstractQuickFixMultiModul
         runTest("idea/testData/multiModuleQuickFix/expectNestedClass/");
     }
 
+    @TestMetadata("expectPrimaryConstructor")
+    public void testExpectPrimaryConstructor() throws Exception {
+        runTest("idea/testData/multiModuleQuickFix/expectPrimaryConstructor/");
+    }
+
     @TestMetadata("expectProperty")
     public void testExpectProperty() throws Exception {
         runTest("idea/testData/multiModuleQuickFix/expectProperty/");