K2: report EXPLICIT_TYPE_ARGUMENTS_... also on resolved qualifiers

#KT-64982 Fixed

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/expression/FirStandaloneQualifierChecker.kt

@@ -25,7 +25,12 @@ object FirStandaloneQualifierChecker : FirResolvedQualifierChecker() {
         if (!expression.isStandalone(context)) return
 
         // Note: if it's real Unit, it will be filtered by ClassKind.OBJECT check below in reportErrorOn
-        if (!expression.resolvedType.isUnit) return
+        if (!expression.resolvedType.isUnit) {
+            if (expression.typeArguments.any { it.source != null }) {
+                reporter.reportOn(expression.source, FirErrors.EXPLICIT_TYPE_ARGUMENTS_IN_PROPERTY_ACCESS, context)
+            }
+            return
+        }
 
         expression.symbol.reportErrorOn(expression.source, context, reporter)
     }

compiler/testData/diagnostics/tests/incompleteCode/incompleteConstructorCall.fir.kt

@@ -15,11 +15,11 @@ class Outer<T> {
     object Obj
 }
 
-val test = Outer<String>
+val test = <!EXPLICIT_TYPE_ARGUMENTS_IN_PROPERTY_ACCESS!>Outer<!><String>
 
-val test2 = Outer.Nested<String>
+val test2 = Outer.<!EXPLICIT_TYPE_ARGUMENTS_IN_PROPERTY_ACCESS!>Nested<!><String>
 
-val test3 = Outer<Int>.<!NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE!>Inner<!><Double>
+val test3 = Outer<Int>.<!EXPLICIT_TYPE_ARGUMENTS_IN_PROPERTY_ACCESS, NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE!>Inner<!><Double>
 
 val test4 = Outer<Int>.<!NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE!>Obj<!>