Adapt test infrastructure to the latest changes

^KT-43677 In Progress

compiler/testData/codegen/java15/box/records/recordDifferentPropertyOverride.kt

@@ -1,3 +1,4 @@
+// JVM_TARGET: 15_PREVIEW
 // FILE: MyRec.java
 public record MyRec(String name) implements KI {
     public String getName() {

compiler/testData/codegen/java15/box/records/recordDifferentSyntheticProperty.kt

@@ -1,3 +1,4 @@
+// JVM_TARGET: 15_PREVIEW
 // FILE: MyRec.java
 public record MyRec(String name) {
     public String getName() {

compiler/testData/codegen/java15/box/records/recordPropertyAccess.kt

@@ -1,3 +1,4 @@
+// JVM_TARGET: 15_PREVIEW
 // FILE: MyRec.java
 public record MyRec(String name) {}
 
@@ -7,4 +8,4 @@ fun box(): String {
     if (r.name() != "OK") return "fail 1"
 
     return r.name
-}
+}