[MPP] Permit const actual properties for non-const expects

It's safe as not having const is more restrictive, therefore can be
allowed in common. Otherwise, it's not possible to declare an expect
declaration for a platform property with `const` modifier in common

KT-18856

compiler/resolution.common/src/org/jetbrains/kotlin/resolve/multiplatform/ExpectActualCompatibility.kt

@@ -56,7 +56,8 @@ sealed class ExpectActualCompatibility<out D> {
         // Properties
 
         object PropertyKind : Incompatible<Nothing>("property kinds are different (val vs var)")
-        object PropertyModifiers : Incompatible<Nothing>("modifiers are different (const, lateinit)")
+        object PropertyLateinitModifier : Incompatible<Nothing>("modifiers are different (lateinit)")
+        object PropertyConstModifier : Incompatible<Nothing>("modifiers are different (const)")
 
         // Classifiers