Feature: #66371 - Introduce autoplay option for video and audio files

See forge#66371

Description

The RenderingRegistry added with #61800 introduced the option to render video and audio tags with the new MediaViewHelper added with #66366. To improve the usability of this feature an autoplay checkbox has been added to the sys_file_reference records to enable the editor to configure this option on a per file basis.

To make the autoplay option available in sys_file_reference records, make use of the new palettes videoOverlayPalette and audioOverlayPalette in your TCA.

However, the autoplay property of the sys_file_reference is only taken into account if the view helper does not explicitly specify an autoplay option.

Examples:

Example config of an sys_file_reference field in TCA:

'media' => array(
	'exclude' => 1,
	'label' => 'Media',
	'config' => \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::getFileFieldTCAConfig(
		'media',
		array(
			'foreign_types' => array(
				\TYPO3\CMS\Core\Resource\File::FILETYPE_AUDIO => array(
					'showitem' => '
						--palette--;;audioOverlayPalette,
						--palette--;;filePalette',
				),
				\TYPO3\CMS\Core\Resource\File::FILETYPE_VIDEO => array(
					'showitem' => '
						--palette--;;videoOverlayPalette,
						--palette--;;filePalette',
				)
			)
		),
		'wav,mpeg,mp4,ogg'
	)
)
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<code title="MP4 Video Object with autoplay option set regardless of sys_file_reference checkbox">
	<f:media file="{file}" width="400" height="375" additionalConfig="{autoplay: '1'}" />
</code>
<output>
	<video width="400" height="375" controls autoplay><source src="fileadmin/user_upload/my-video.mp4" type="video/mp4"></video>
</output>

 <code title="MP4 Video Object without autoplay option set will respect the configuration of the sys_file_reference record">
	<f:media file="{file}" width="400" height="375" />
</code>
<output>
	<video width="400" height="375" controls><source src="fileadmin/user_upload/my-video.mp4" type="video/mp4"></video>
</output>
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