Postpone synthetic properties references feature

KT-8575
Review: https://jetbrains.team/p/kt/reviews/16557/timeline

Reason: K2 IDE isn't ready by 2.1 release (the feature is officially
supported only in K2)
diff --git a/compiler/util/src/org/jetbrains/kotlin/config/LanguageVersionSettings.kt b/compiler/util/src/org/jetbrains/kotlin/config/LanguageVersionSettings.kt
index febf532..eafd2a2 100644
--- a/compiler/util/src/org/jetbrains/kotlin/config/LanguageVersionSettings.kt
+++ b/compiler/util/src/org/jetbrains/kotlin/config/LanguageVersionSettings.kt
@@ -313,7 +313,6 @@
 
     // 2.1
 
-    ReferencesToSyntheticJavaProperties(KOTLIN_2_1), // KT-8575
     ProhibitImplementingVarByInheritedVal(KOTLIN_2_1, kind = BUG_FIX), // KT-56779
     PrioritizedEnumEntries(KOTLIN_2_1, kind = UNSTABLE_FEATURE), // KT-58920
     ProhibitInlineModifierOnPrimaryConstructorParameters(KOTLIN_2_1, kind = BUG_FIX), // KT-59664
@@ -336,6 +335,7 @@
     // 2.2
 
     UnstableSmartcastOnDelegatedProperties(KOTLIN_2_2, kind = BUG_FIX), // KT-57417
+    ReferencesToSyntheticJavaProperties(KOTLIN_2_2), // KT-8575
 
     // End of 2.* language features --------------------------------------------------