KMP: Put "prohbit actual typealias to Nothing and Nullable" under the flag

^KT-61668 Fixed

Review: https://jetbrains.team/p/kt/reviews/12062/timeline

compiler/testData/diagnostics/tests/multiplatform/typealias/actualTypealiasToNothing_oldLanguageVersion.fir.kt

@@ -0,0 +1,14 @@
+// LANGUAGE: -MultiplatformRestrictions
+// MODULE: m1-common
+// FILE: common.kt
+
+<!INCOMPATIBLE_MATCHING{JVM}!>expect class E01<!>
+<!INCOMPATIBLE_MATCHING{JVM}!>expect class E02<!>
+
+// MODULE: m1-jvm()()(m1-common)
+// FILE: jvm.kt
+
+typealias MyNothing = Nothing
+
+actual typealias E01 = Nothing
+<!ACTUAL_TYPE_ALIAS_NOT_TO_CLASS!>actual typealias E02 = MyNothing<!>

compiler/testData/diagnostics/tests/multiplatform/typealias/actualTypealiasToNothing_oldLanguageVersion.kt

@@ -0,0 +1,14 @@
+// LANGUAGE: -MultiplatformRestrictions
+// MODULE: m1-common
+// FILE: common.kt
+
+expect class E01
+expect class E02
+
+// MODULE: m1-jvm()()(m1-common)
+// FILE: jvm.kt
+
+typealias MyNothing = Nothing
+
+actual typealias E01 = Nothing
+<!ACTUAL_TYPE_ALIAS_NOT_TO_CLASS!>actual typealias E02 = MyNothing<!>

compiler/testData/diagnostics/tests/multiplatform/typealias/actualTypealiasToNullableType_oldLanguageVersion.kt

@@ -0,0 +1,15 @@
+// LANGUAGE: -MultiplatformRestrictions
+// FIR_IDENTICAL
+// MODULE: m1-common
+// FILE: common.kt
+
+expect class E01
+expect class E02
+
+// MODULE: m1-jvm()()(m1-common)
+// FILE: jvm.kt
+
+typealias MyNullable = String?
+
+actual typealias E01 = String?
+<!ACTUAL_TYPE_ALIAS_NOT_TO_CLASS!>actual typealias E02 = MyNullable<!>