Add @react-native/babel-plugin-codegen to the preset if src is null

[dmytrorykun]

Summary: X-link: https://github.com/facebook/react-native/pull/39159

Source is not required for getPreset of react-native/babel-preset. There is a codition that adds react-native/babel-plugin-codegen to the preset only if source is passing certain regex. This condition fails if source is null, but that's wrong because the plugin may still be requred for this transformation even though source is not provided. This diff changes the condition so the regexp tests source only if it is not null, and react-native/babel-plugin-codegen automatically added to the preset otherwise. Changelog: [Internal]

Reviewed By: robhogan, RSNara

Differential Revision: D48684443

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D48684443

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D48684443

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D48684443

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D48684443

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: -0.01% :warning:

Comparison is base (e0dd91b) 83.39% compared to head (e8bb13b) 83.38%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1078 +/- ## ========================================== - Coverage 83.39% 83.38% -0.01% ========================================== Files 209 209 Lines 10835 10836 +1 Branches 2725 2725 ========================================== Hits 9036 9036 - Misses 1799 1800 +1 ``` | [Files Changed](https://app.codecov.io/gh/facebook/metro/pull/1078?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=facebook) | Coverage Δ | | |---|---|---| | [...ackages/metro-babel-register/src/babel-register.js](https://app.codecov.io/gh/facebook/metro/pull/1078?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=facebook#diff-cGFja2FnZXMvbWV0cm8tYmFiZWwtcmVnaXN0ZXIvc3JjL2JhYmVsLXJlZ2lzdGVyLmpz) | `28.12% <0.00%> (-0.91%)` | :arrow_down: |

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[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D48684443

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D48684443