FIR: use more specific cone error for unresolved user type ref

replaces diagnostic with <No name> with specific qualifier

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/diagnostics/FirDiagnostics.kt

@@ -26,6 +26,10 @@ class ConeUnresolvedSymbolError(val classId: ClassId) : ConeDiagnostic() {
     override val reason: String get() = "Symbol not found for $classId"
 }
 
+class ConeUnresolvedQualifierError(val qualifier: String) : ConeDiagnostic() {
+    override val reason: String get() = "Symbol not found for ${qualifier}"
+}
+
 class ConeUnresolvedNameError(val name: Name) : ConeDiagnostic() {
     override val reason: String get() = "Unresolved name: $name"
 }

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/providers/impl/FirTypeResolverImpl.kt

@@ -14,6 +14,7 @@ import org.jetbrains.kotlin.fir.diagnostics.ConeUnexpectedTypeArgumentsError
 import org.jetbrains.kotlin.fir.diagnostics.DiagnosticKind
 import org.jetbrains.kotlin.fir.render
 import org.jetbrains.kotlin.fir.resolve.*
+import org.jetbrains.kotlin.fir.resolve.diagnostics.ConeUnresolvedQualifierError
 import org.jetbrains.kotlin.fir.resolve.diagnostics.ConeWrongNumberOfTypeArgumentsError
 import org.jetbrains.kotlin.fir.resolve.getSymbolByLookupTag
 import org.jetbrains.kotlin.fir.resolve.substitution.ConeSubstitutor
@@ -98,7 +99,7 @@ class FirTypeResolverImpl(private val session: FirSession) : FirTypeResolver() {
         areBareTypesAllowed: Boolean
     ): ConeKotlinType {
         if (symbol == null) {
-            return ConeKotlinErrorType(ConeSimpleDiagnostic("Symbol not found, for `${typeRef.render()}`", DiagnosticKind.SymbolNotFound))
+            return ConeKotlinErrorType(ConeUnresolvedQualifierError(typeRef.render()))
         }
         if (symbol is FirTypeParameterSymbol) {
             for (part in typeRef.qualifier) {