[FE 1.0] Deprecate declaration of expect and actual in the same module

^KT-40904 Fixed
^KT-55177 Fixed

compiler/testData/diagnostics/tests/IncDecOperatorsInExpectClass.fir.kt

@@ -0,0 +1,10 @@
+// !LANGUAGE: +MultiPlatformProjects
+// SKIP_TXT
+// Issue: KT-49714
+
+expect class Counter {
+    operator fun inc(): Counter
+    operator fun dec(): Counter
+}
+
+actual typealias Counter = Int

compiler/testData/diagnostics/tests/IncDecOperatorsInExpectClass.kt

@@ -1,11 +1,10 @@
-// FIR_IDENTICAL
 // !LANGUAGE: +MultiPlatformProjects
 // SKIP_TXT
 // Issue: KT-49714
 
-expect class Counter {
+expect <!EXPECT_AND_ACTUAL_IN_THE_SAME_MODULE!>class Counter<!> {
     operator fun inc(): Counter
     operator fun dec(): Counter
 }
 
-actual typealias Counter = Int
+actual typealias <!EXPECT_AND_ACTUAL_IN_THE_SAME_MODULE!>Counter<!> = Int

compiler/testData/diagnostics/tests/multiplatform/expectAndActualInSameModule.fir.kt

@@ -0,0 +1,17 @@
+// ISSUE: KT-40904, KT-55177
+
+expect class Foo {
+    fun memberFun()
+    val memberProp: Int
+}
+actual class Foo {
+    <!ACTUAL_WITHOUT_EXPECT!>actual fun memberFun() {}<!>
+    <!ACTUAL_WITHOUT_EXPECT!>actual val memberProp: Int = 10<!>
+}
+
+expect fun foo()
+<!ACTUAL_WITHOUT_EXPECT!>actual fun foo() {}<!>
+
+expect val x: String
+<!ACTUAL_WITHOUT_EXPECT!>actual val x: String
+    get() = "hello"<!>

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

@@ -0,0 +1,17 @@
+// ISSUE: KT-40904, KT-55177
+
+expect <!EXPECT_AND_ACTUAL_IN_THE_SAME_MODULE!>class Foo<!> {
+    fun memberFun()
+    val memberProp: Int
+}
+actual <!EXPECT_AND_ACTUAL_IN_THE_SAME_MODULE!>class Foo<!> {
+    actual fun memberFun() {}
+    actual val memberProp: Int = 10
+}
+
+expect fun <!EXPECT_AND_ACTUAL_IN_THE_SAME_MODULE!>foo<!>()
+actual fun <!EXPECT_AND_ACTUAL_IN_THE_SAME_MODULE!>foo<!>() {}
+
+expect val <!EXPECT_AND_ACTUAL_IN_THE_SAME_MODULE!>x<!>: String
+actual val <!EXPECT_AND_ACTUAL_IN_THE_SAME_MODULE!>x<!>: String
+    get() = "hello"

compiler/testData/diagnostics/tests/multiplatform/expectAndActualInSameModule.txt

@@ -0,0 +1,14 @@
+package
+
+public actual val x: kotlin.String
+public actual fun foo(): kotlin.Unit
+
+public final actual class Foo {
+    public constructor Foo()
+    public actual final val memberProp: kotlin.Int = 10
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public final actual fun memberFun(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+