[IR] Allow inline modifier for functions returning MFVC without warning

Signed-off-by: Evgeniy.Zhelenskiy <Evgeniy.Zhelenskiy@jetbrains.com>

#KT-1179

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

@@ -17590,6 +17590,12 @@ public class DiagnosisCompilerTestFE10TestdataTestGenerated extends AbstractDiag
                 runTest("compiler/testData/diagnostics/tests/inline/superProperty.kt");
             }
 
+            @Test
+            @TestMetadata("valueClasses.kt")
+            public void testValueClasses() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/inline/valueClasses.kt");
+            }
+
             @Test
             @TestMetadata("vararg.kt")
             public void testVararg() throws Exception {