[NI] Fix isNullableType for definitely not null type parameter

Consider type parameter with nullable bound not null
if it is inside of a definitely not null type.

compiler/fir/resolve/tests/org/jetbrains/kotlin/fir/FirOldFrontendDiagnosticsTestGenerated.java

@@ -15237,6 +15237,11 @@ public class FirOldFrontendDiagnosticsTestGenerated extends AbstractFirOldFronte
             runTest("compiler/testData/diagnostics/tests/nullableTypes/baseWithNullableUpperBound.kt");
         }
 
+        @TestMetadata("definitelyNotNullWithNullableBound.kt")
+        public void testDefinitelyNotNullWithNullableBound() throws Exception {
+            runTest("compiler/testData/diagnostics/tests/nullableTypes/definitelyNotNullWithNullableBound.kt");
+        }
+
         @TestMetadata("elvisOnUnit.kt")
         public void testElvisOnUnit() throws Exception {
             runTest("compiler/testData/diagnostics/tests/nullableTypes/elvisOnUnit.kt");