Template field: Remove dependency with the "settings" object

[gigitux]

Currently, the Template field works only if it wrapped by the ExperimentalBlockEditorProvider provider passing the settings object obtained via usePatternSettings.

gutenberg/packages/edit-site/src/components/post-edit/index.js

Lines 139 to 157 in f891475

	/**
	* The template field depends on the block editor settings.
	* This is a workaround to ensure that the block editor settings are available.
	*/
	const fieldsWithDependency = useMemo( () => {
	return fields.map( ( field ) => {
	if ( field.id === 'template' ) {
	return {
	...field,
	Edit: ( data ) => (
	<ExperimentalBlockEditorProvider settings={ settings }>
	<field.Edit { ...data } />
	</ExperimentalBlockEditorProvider>
	),
	};
	}
	return field;
	} );
	}, [ fields, settings ] );

Instead, the Template field should work without any hidden requirement. For this reason, to get the necessary data, core-data package could be used instead of the settings object.

See #66591 (comment)