FIR: Minor. Clarify naming for unwrapping overrides

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/Synthetics.kt

@@ -85,7 +85,7 @@ class FirSyntheticPropertiesScope(
     private fun FirFunctionSymbol<*>.hasJavaOverridden(): Boolean {
         var result = false
         baseScope.processOverriddenFunctionsAndSelf(this) {
-            if (it.unwrapOverridden().fir.origin == FirDeclarationOrigin.Enhancement) {
+            if (it.unwrapSubstitutionOverrides().fir.origin == FirDeclarationOrigin.Enhancement) {
                 result = true
                 ProcessorAction.STOP
             } else {

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/scopes/impl/FirClassSubstitutionScope.kt

@@ -69,7 +69,7 @@ class FirClassSubstitutionScope(
         functionSymbol: FirFunctionSymbol<*>,
         processor: (FirFunctionSymbol<*>) -> ProcessorAction
     ): ProcessorAction {
-        val unwrapped = functionSymbol.unwrapOverriddenOnce()
+        val unwrapped = functionSymbol.overriddenSymbol as FirFunctionSymbol<*>? ?: functionSymbol
         return useSiteMemberScope.processOverriddenFunctions(unwrapped, processor)
     }