[0.9] remove ids refs from form_data

[Lendemor]

Passing both name and ids refs can lead to duplicate data, we should only pass form data by name.

Fix #5418 (when extracting hooks in stateful components, the form hook still refer refs but the import is removed, leading to the error)

[codspeed-hq]

CodSpeed Performance Report

Merging #5430 will not alter performance

_{Comparing lendemor/fix_form_data (32ff737) with main (e9cd7e0)}

Summary

✅ 8 untouched benchmarks

[greptile-apps]

PR Summary

Simplified form data handling by removing ID-based refs, preventing duplicate submissions and fixing a production build ReferenceError in stateful components.

• Modified reflex/components/el/elements/forms.py to exclusively use FormData object for submissions, removing refs-based collection
• Updated test suite in tests/integration/test_form_submit.py to remove ID-based form tests ('id-radix', 'id-html'), standardizing on name attributes
• Fixed ReferenceError in production builds where refs was undefined after hook extraction in stateful components (Issue #5418)

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