[Low Level FIR] do not try to lazy resolve FirBackingField

analysis/low-level-api-fir/src/org/jetbrains/kotlin/analysis/low/level/api/fir/lazy/resolve/LLFirModuleLazyDeclarationResolver.kt

@@ -277,6 +277,7 @@ internal class LLFirModuleLazyDeclarationResolver(val moduleComponents: LLFirMod
                     toPhase,
                     checkPCE,
                 )
+                return
             }
 
             is FirFile -> {