Report error instead of warning for deprecation level HIDDEN

Since functions usually are hidden from resolution when they are
deprecated-hidden, the problem can only be reproduced for properties with
deprecated-hidden accessors, where DeprecatedCallChecker reported warnings
instead of errors

compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestGenerated.java

@@ -5952,6 +5952,12 @@ public class DiagnosticsTestGenerated extends AbstractDiagnosticsTest {
                 doTest(fileName);
             }
 
+            @TestMetadata("hiddenPropertyAccessors.kt")
+            public void testHiddenPropertyAccessors() throws Exception {
+                String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/deprecated/hiddenPropertyAccessors.kt");
+                doTest(fileName);
+            }
+
             @TestMetadata("importJavaSamInterface.kt")
             public void testImportJavaSamInterface() throws Exception {
                 String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/deprecated/importJavaSamInterface.kt");