Media: Show an error message when a `.heic` file is uploaded that this type of...

Media: Show an error message when a `.heic` file is uploaded that this type of files cannot be displayed in a web browser and suggesting to convert to JPEG. The message is shown by using filters, plugins that want to handle uploading of `.heic` files can remove it.

Props mattheweppelsheimer, mikeschroder, jeffr0, andraganescu, desrosj, azaozz.
Fixes #42775.
Built from https://develop.svn.wordpress.org/trunk@48288


git-svn-id: https://core.svn.wordpress.org/trunk@48057 1a063a9b-81f0-0310-95a4-ce76da25c4cd