Add the ability to pick multiple videos

[EchoEllet]

The package image_picker_platform_interface has added a method for picking multiple videos in 2.11.0 (PR flutter/packages#9775, which fixes issue flutter/flutter#102283). The image_picker package uses that new method, which is implemented by platform implementations such as image_picker_macos. The platform implementation package native_image_picker_macos needs to be updated to override the default getMultiVideoWithOptions that throws an UnsupportedError.