tmp: implement a hack to fix LA test

due to a missing mechanism to handle a case when LA succeeds while
codegen fails. See detailed comment in the source.
Fixes implicit conversion test introduced in the previous commit.

compiler/testData/codegen/box/unsignedTypes/signedToUnsignedConversions.kt

@@ -1,6 +1,8 @@
 // WITH_STDLIB
 // !LANGUAGE: +ImplicitSignedToUnsignedIntegerConversion
 // IGNORE_BACKEND_K1: JVM
+// dedicated hack to avoid unmuting this test in light analysis, see comments in AbstractLightAnalysisModeTest
+// FAIL_IN_LIGHT_ANALYSIS
 // FILE: signedToUnsignedConversions_annotation.kt
 
 package kotlin.internal