Use mock JDK in compiler tests where full JDK is not needed

- move some of boxWithStdlib tests under fullJdk/ directory, where they will be
  compiled against the full JDK
- introduce FULL_JDK in-text directive for the reflection test as only 4 tests
  out of 654 needed the full JDK

compiler/tests/org/jetbrains/kotlin/test/JetTestUtils.java

@@ -250,12 +250,6 @@ public class JetTestUtils {
         return JvmResolveUtil.analyzeOneFileWithJavaIntegration(file);
     }
 
-    @NotNull
-    public static KotlinCoreEnvironment createEnvironmentWithFullJdk(Disposable disposable) {
-        return createEnvironmentWithJdkAndNullabilityAnnotationsFromIdea(disposable,
-                                                                         ConfigurationKind.ALL, TestJdkKind.FULL_JDK);
-    }
-
     @NotNull
     public static KotlinCoreEnvironment createEnvironmentWithMockJdkAndIdeaAnnotations(Disposable disposable) {
         return createEnvironmentWithMockJdkAndIdeaAnnotations(disposable, ConfigurationKind.ALL);