[NI] Fix completion for ILT when Nothing constraint is present

Full completion should not be done if lower `Nothing`
is the only proper constraint when constraint with ILT type is present.
ILT will be selected as a resulting type and transformed into `Int`
without attention to possible restrictions from outer calls.

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

@@ -10662,6 +10662,11 @@ public class FirOldFrontendDiagnosticsTestGenerated extends AbstractFirOldFronte
                 runTest("compiler/testData/diagnostics/tests/inference/completion/partialForIlt.kt");
             }
 
+            @TestMetadata("partialForIltWithNothing.kt")
+            public void testPartialForIltWithNothing() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/inference/completion/partialForIltWithNothing.kt");
+            }
+
             @TestMetadata("transitiveConstraint.kt")
             public void testTransitiveConstraint() throws Exception {
                 runTest("compiler/testData/diagnostics/tests/inference/completion/transitiveConstraint.kt");