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

This reverts commit b09561c3c3.

It was decided to postpone this warning till 1.9
This is needed to provide proper IDE support

^KT-40904 Open
^KT-55177 Open

compiler/testData/diagnostics/tests/IncDecOperatorsInExpectClass.kt

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