FIR: cache properties in use-site scope properly

compiler/fir/java/src/org/jetbrains/kotlin/fir/java/scopes/JavaClassUseSiteMemberScope.kt

@@ -103,16 +103,17 @@ class JavaClassUseSiteMemberScope(
         return minOf(a, b)
     }
 
-    override fun processPropertiesByName(name: Name, processor: (FirVariableSymbol<*>) -> Unit) {
+    override fun doProcessProperties(name: Name): Collection<FirVariableSymbol<*>> {
         val fields = mutableSetOf<FirCallableSymbol<*>>()
         val fieldNames = mutableSetOf<Name>()
+        val result = mutableSetOf<FirVariableSymbol<*>>()
 
         // fields
         declaredMemberScope.processPropertiesByName(name) processor@{ variableSymbol ->
             if (variableSymbol.isStatic) return@processor
             fields += variableSymbol
             fieldNames += variableSymbol.fir.name
-            processor(variableSymbol)
+            result += variableSymbol
         }
 
         val fromSupertypes = superTypesScope.getProperties(name)
@@ -120,7 +121,7 @@ class JavaClassUseSiteMemberScope(
         for (propertyFromSupertype in fromSupertypes) {
             if (propertyFromSupertype is FirFieldSymbol) {
                 if (propertyFromSupertype.fir.name !in fieldNames) {
-                    processor(propertyFromSupertype)
+                    result += propertyFromSupertype
                 }
                 continue
             }
@@ -132,11 +133,12 @@ class JavaClassUseSiteMemberScope(
                 overrideInClass != null -> {
                     directOverriddenProperties.getOrPut(overrideInClass) { mutableListOf() }.add(propertyFromSupertype)
                     overrideByBase[propertyFromSupertype] = overrideInClass
-                    processor(overrideInClass)
+                    result += overrideInClass
                 }
-                else -> processor(propertyFromSupertype)
+                else -> result += propertyFromSupertype
             }
         }
+        return result
     }
 
     private fun FirVariableSymbol<*>.createOverridePropertyIfExists(