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

See Issue #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'
        )
)
<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>