Update box test for unsigned to signed conversions

Updated test checks, that large unsigned numbers are converted to corresponding
negative signed numbers properly. Using unsinged constants instead of signed
in test allows to remove supressed OI error as well as use test with NI.

compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java

@@ -27756,6 +27756,11 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             runTest("compiler/testData/codegen/box/unsignedTypes/unsignedRangeIterator.kt");
         }
 
+        @TestMetadata("unsignedToSignedConversion.kt")
+        public void testUnsignedToSignedConversion() throws Exception {
+            runTest("compiler/testData/codegen/box/unsignedTypes/unsignedToSignedConversion.kt");
+        }
+
         @TestMetadata("unsignedTypePrefixIncrementDecrementBoxing.kt")
         public void testUnsignedTypePrefixIncrementDecrementBoxing() throws Exception {
             runTest("compiler/testData/codegen/box/unsignedTypes/unsignedTypePrefixIncrementDecrementBoxing.kt");