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/nullCheckOptimization/redundantSafeCall.kt

@@ -3,4 +3,4 @@ fun test(s: String) = s?.length
 // 0 IFNULL
 // 0 IFNONNULL
 // 0 intValue
-// 0 valueOf
+// 1 valueOf

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 {

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

@@ -13,9 +13,8 @@ class A {
             Season.WINTER, Season.SPRING -> return "winter_spring"
             Season.SPRING -> return "spring"
             Season.SUMMER -> return "summer"
+            else -> return "autumn"
         }
-
-        return "autumn";
     }
 
     public fun bar2(y : Season) : String {

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

@@ -9,18 +9,16 @@ fun foo1(x : Season?) : String {
     when(x) {
         Season.AUTUMN, Season.SPRING -> return "autumn_or_spring";
         Season.SUMMER, null -> return "summer_or_null"
+        else -> return "other"
     }
-
-    return "other"
 }
 
 fun foo2(x : Season?) : String {
     when(x) {
         Season.AUTUMN, Season.SPRING -> return "autumn_or_spring";
         Season.SUMMER -> return "summer"
+        else -> return "other"
     }
-
-    return "other"
 }
 
 // 2 TABLESWITCH

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

@@ -12,8 +12,8 @@ fun bar1(x : Season) : String {
         Season.WINTER, Season.SPRING -> return "winter_spring"
         Season.SPRING -> return "spring"
         Season.SUMMER -> return "summer"
+        else -> return "autumn"
     }
-    return "autumn"
 }
 
 fun bar2(x : Season) : String {
@@ -22,9 +22,8 @@ fun bar2(x : Season) : String {
         Season.SPRING -> return "spring"
         Season.SUMMER -> return "summer"
         Season.AUTUMN -> return "autumn"
+        else -> return "fail unknown"
     }
-
-    return "fail unknown"
 }
 
 // 2 TABLESWITCH