Fix Fabric debug message when we set `fabric_enabled = false` in `rn-tester` (#32502)
Fix Fabric debug message when we set `fabric_enabled = false` in `rn-tester` (#32502)

Summary:
The debug message stays `Building RNTester with Fabric enabled.` even if we set `fabric_enabled = false`

This pull request changes the message like below when `fabric_enabled = false`

`Building RNTester with Fabric disabled.`

## Changelog

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[iOS] [Fixed] - Fix the debug message for Fabric in rn-tester

Pull Request resolved: https://github.com/facebook/react-native/pull/32502

Reviewed By: sota000

Differential Revision: D32027858

Pulled By: lunaleaps

fbshipit-source-id: baf5301581e354f588830acd12a5e8171799b1ca

facebook/react-native,janicduplessis/react-native,javache/react-native,facebook/react-native,janicduplessis/react-native,janicduplessis/react-native,facebook/react-native,janicduplessis/react-native,facebook/react-native,javache/react-native,javache/react-native,javache/react-native,javache/react-native,janicduplessis/react-native,facebook/react-native,janicduplessis/react-native,javache/react-native,janicduplessis/react-native,janicduplessis/react-native,facebook/react-native,facebook/react-native,facebook/react-native,javache/react-native,javache/react-native,facebook/react-native,javache/react-native