[FIR] Add toString() to ErrorTypeConstructor and ConeClassifierLookupTag

compiler/fir/cones/src/org/jetbrains/kotlin/fir/symbols/ConeLookupTags.kt

@@ -10,10 +10,12 @@ import org.jetbrains.kotlin.name.Name
 
 abstract class ConeClassifierLookupTag {
     abstract val name: Name
+
+    override fun toString(): String {
+        return name.asString()
+    }
 }
 
-
-
 abstract class ConeClassLikeLookupTag : ConeClassifierLookupTag() {
     abstract val classId: ClassId
 

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

@@ -30,7 +30,9 @@ import org.jetbrains.kotlin.types.TypeSystemCommonBackendContext
 import org.jetbrains.kotlin.types.checker.convertVariance
 import org.jetbrains.kotlin.types.model.*
 
-class ErrorTypeConstructor(val reason: String) : TypeConstructorMarker
+class ErrorTypeConstructor(val reason: String) : TypeConstructorMarker {
+    override fun toString(): String = reason
+}
 
 interface ConeTypeContext : TypeSystemContext, TypeSystemOptimizationContext, TypeCheckerProviderContext, TypeSystemCommonBackendContext {
     val session: FirSession