K2: unmute testInnerClassPackageConflict2 thus fixing current K2 behavior

Related to KT-63070, KT-60792

compiler/testData/compileKotlinAgainstCustomBinaries/innerClassPackageConflict2/output.fir.txt

@@ -0,0 +1,4 @@
+compiler/testData/compileKotlinAgainstCustomBinaries/innerClassPackageConflict2/source.kt:10:9: error: unresolved reference 'Nested'.
+val v3: Nested? = null
+        ^
+COMPILATION_ERROR

compiler/tests/org/jetbrains/kotlin/jvm/compiler/AbstractCompileKotlinAgainstCustomBinariesTest.kt

@@ -472,8 +472,7 @@ abstract class AbstractCompileKotlinAgainstCustomBinariesTest : AbstractKotlinCo
         compileKotlin("source.kt", tmpdir, listOf(File(tmpdir, "library.jar")))
     }
 
-    // KT-60792 K2 can resolve FQ type name to a nested classifier even in presence of a parent package
-    fun testInnerClassPackageConflict2() = muteForK2 {
+    fun testInnerClassPackageConflict2() {
         val library1 = compileLibrary("library1", destination = File(tmpdir, "library1"))
         val library2 = compileLibrary("library2", destination = File(tmpdir, "library2"))