FIR: suppress excessive warning on java Class

The root cause is https://youtrack.jetbrains.com/issue/KT-49358 though.
We should undo this change after that issue is fixed.

analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosisCompilerTestFE10TestdataTestGenerated.java

@@ -32575,6 +32575,12 @@ public class DiagnosisCompilerTestFE10TestdataTestGenerated extends AbstractDiag
                 runTest("compiler/testData/diagnostics/tests/when/whenAndLambdaWithExpectedType.kt");
             }
 
+            @Test
+            @TestMetadata("whenOnClass.kt")
+            public void testWhenOnClass() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/when/whenOnClass.kt");
+            }
+
             @Test
             @TestMetadata("whenOnNothing.kt")
             public void testWhenOnNothing() throws Exception {