[K/N, K/JS, K/WASM] Enable FakeOverrideRebuilder by default

While not beeing final solution, this is closer to what
we want to have in the end. Enabling on non-JVM targets
would help better testing.

Enabling in JVM is now not possible yet, as some of the bugs are
not fixed yet (check KT-61360 for details)

^KT-62476

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

@@ -106,7 +106,7 @@ internal fun PhaseContext.fir2Ir(
             inlineConstTracker = null,
             expectActualTracker = configuration[CommonConfigurationKeys.EXPECT_ACTUAL_TRACKER],
             allowNonCachedDeclarations = false,
-            useIrFakeOverrideBuilder = configuration.getBoolean(CommonConfigurationKeys.USE_IR_FAKE_OVERRIDE_BUILDER),
+            useIrFakeOverrideBuilder = true,
     )
     val (irModuleFragment, components, pluginContext, irActualizedResult) = input.firResult.convertToIrAndActualize(
             NativeFir2IrExtensions,