Do not reference object's toString result in exception messages

Since we put object's hash code in toString, we end up in putting
non-stable hash code to constant table, which leads to unstable
binaries.

 #KTI-1193 Fixed

compiler/backend/src/org/jetbrains/kotlin/codegen/OwnerKind.kt

@@ -20,7 +20,7 @@ enum class OwnerKind {
         fun getMemberOwnerKind(descriptor: DeclarationDescriptor): OwnerKind = when (descriptor) {
             is PackageFragmentDescriptor -> PACKAGE
             is ClassDescriptor -> IMPLEMENTATION
-            else -> throw AssertionError("Unexpected declaration container: $this")
+            else -> throw AssertionError("Unexpected declaration container: $descriptor")
         }
     }
 }

compiler/fir/fir2ir/jvm-backend/src/org/jetbrains/kotlin/fir/backend/jvm/FirJvmVisibilityConverter.kt

@@ -17,7 +17,7 @@ object FirJvmVisibilityConverter : Fir2IrVisibilityConverter() {
             JavaVisibilities.PackageVisibility -> org.jetbrains.kotlin.load.java.JavaDescriptorVisibilities.PACKAGE_VISIBILITY
             JavaVisibilities.ProtectedStaticVisibility -> org.jetbrains.kotlin.load.java.JavaDescriptorVisibilities.PROTECTED_STATIC_VISIBILITY
             JavaVisibilities.ProtectedAndPackage -> org.jetbrains.kotlin.load.java.JavaDescriptorVisibilities.PROTECTED_AND_PACKAGE
-            else -> error("Unknown visibility: $this")
+            else -> error("Unknown visibility: $visibility")
         }
     }
 }

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrVisibilityConverter.kt

@@ -12,7 +12,7 @@ import org.jetbrains.kotlin.descriptors.DescriptorVisibility
 abstract class Fir2IrVisibilityConverter {
     object Default : Fir2IrVisibilityConverter() {
         override fun convertPlatformVisibility(visibility: Visibility): DescriptorVisibility {
-            error("Unknown visibility: $this")
+            error("Unknown visibility: $visibility")
         }
     }