Switch kotlin version to 1.7

* Change 1.6 to 1.7 constants
* Fix SAFE_CALL_WILL_CHANGE_NULLABILITY for testData
* Change EXPOSED_PROPERTY_TYPE_IN_CONSTRUCTOR_WARNING to EXPOSED_PROPERTY_TYPE_IN_CONSTRUCTOR_ERROR
* Change NON_EXHAUSTIVE_WHEN_STATEMENT to NO_ELSE_IN_WHEN
* Fix testData for SafeCallsAreAlwaysNullable
* Change T -> T & Any in test dumps
* Change INVALID_CHARACTERS_NATIVE_WARNING -> INVALID_CHARACTERS_NATIVE_ERROR
* TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM_WARNING -> TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM_ERROR

compiler/testData/codegen/bytecodeText/whenEnumOptimization/bigEnum.kt

@@ -9,10 +9,8 @@ fun bar1(x : BigEnum) : String {
     when (x) {
         BigEnum.ITEM1, BigEnum.ITEM2, BigEnum.ITEM3 -> return "123"
         BigEnum.ITEM4, BigEnum.ITEM5, BigEnum.ITEM6 -> return "456"
+        else -> return "-1"
     }
-
-    return "-1";
-
 }
 
 fun bar2(x : BigEnum) : String {