[NI] Assume that ILT is number type in inference

#KT-41679 Fixed

compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java

@@ -18957,6 +18957,12 @@ public class FirOldFrontendDiagnosticsTestGenerated extends AbstractFirDiagnosti
                 runTest("compiler/testData/diagnostics/tests/numbers/intValuesOutOfRange.kt");
             }
 
+            @Test
+            @TestMetadata("kt41679.kt")
+            public void testKt41679() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/numbers/kt41679.kt");
+            }
+
             @Test
             @TestMetadata("literalReceiverWithIntegerValueType.kt")
             public void testLiteralReceiverWithIntegerValueType() throws Exception {

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/types/ConeInferenceContext.kt

@@ -386,6 +386,7 @@ interface ConeInferenceContext : TypeSystemInferenceExtensionContext, ConeTypeCo
 
     override fun KotlinTypeMarker.isSignedOrUnsignedNumberType(): Boolean {
         require(this is ConeKotlinType)
+        if (this is ConeIntegerLiteralType) return true
         if (this !is ConeClassLikeType) return false
         return isPrimitiveNumberOrUnsignedNumberType()
     }