Remove Fragment wrapper from foreach output to support iterable children in components like carousels

[ppspps824]

All Submissions:

• Have you followed the guidelines stated in [CONTRIBUTING.md](https://github.com/reflex-dev/reflex/blob/main/CONTRIBUTING.md) file?
• Have you checked to ensure there aren't any other open [Pull Requests](https://github.com/reflex-dev/reflex/pulls) for the desired changes?

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Type of change

• Bug fix (non-breaking change which fixes an issue)

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New Feature Submission:

• Does your submission pass the tests?
• Have you linted your code locally prior to submission?

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Changes To Core Features:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your core changes, as applicable?
• Have you successfully ran tests with your changes locally?

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Description

This PR modifies the code generation logic for the foreach function in Reflex. Previously, elements generated by foreach were wrapped in a React Fragment (<>...</>), which breaks compatibility with components like react-multi-carousel or react-responsive-carousel that expect a flat iterable of children elements.

This change removes the Fragment wrapper in these cases, allowing iterable children to be passed correctly.

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Related Issue

Closes #5248

[adhami3310]

we added those for a reason: #3877

but the jsx PR: #5127 should fix both of those issues (i'm hoping)

[codspeed-hq]

CodSpeed Performance Report

Merging #5249 will not alter performance

_{Comparing ppspps824:fix/ppspps824/remove-fragment (29a33aa) with main (54b3bf1)}

Summary

✅ 8 untouched benchmarks

[ppspps824]

Thank you.I will close this issue as I support your PR.