CLI: add -Xuse-ir-fake-override-builder

To be able to test IR fake override builder (KT-61514) outside of
compiler tests.

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Fir2Ir.kt

@@ -81,6 +81,7 @@ internal fun PhaseContext.fir2Ir(
                     .putIfAbsent(CommonConfigurationKeys.EVALUATED_CONST_TRACKER, EvaluatedConstTracker.create()),
             inlineConstTracker = null,
             allowNonCachedDeclarations = false,
+            useIrFakeOverrideBuilder = configuration.getBoolean(CommonConfigurationKeys.USE_IR_FAKE_OVERRIDE_BUILDER),
     )
     val (irModuleFragment, components, pluginContext, irActualizedResult) = input.firResult.convertToIrAndActualize(
             fir2IrExtensions,