I18n: Fix broken loop in WP_Theme_JSON_Resolver

[gziolo]

Description

Fixes #33552.

The loop in WP_Theme_JSON_Resolver to extract translatable paths is broken, as it contains an immediate and unconditional return. This causes the loop to immediately exit again after the first iteration, thus never actually looping.

gutenberg/lib/class-wp-theme-json-resolver-gutenberg.php

Lines 129 to 137 in f76d127

	foreach ( $partial_child as $key => $context ) {
	return array(
	array(
	'path' => $current_path,
	'key' => $key,
	'context' => $context,
	),
	);
	}

This means that the extraction only works where there's only a single item in the array of translatable strings per section (i.e. the 'name' field).

The suggested code would be:

	foreach ( $partial_child as $key => $context ) { 
		$result[] = array(
			'path'    => $current_path, 
			'key'     => $key, 
			'context' => $context, 
		);
	);
	return $result;
 }

This PR applies the changes proposed by @schlessera.

How has this been tested?

npm run test-php

Types of changes

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

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• I've tested my changes with keyboard and screen readers.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).