Customize: Introduce `get_custom_logo_image_attributes` filter for the list of...

Customize: Introduce `get_custom_logo_image_attributes` filter for the list of custom logo image attributes.

Props achbed, dlh, westonruter.
Fixes #36640.
Built from https://develop.svn.wordpress.org/trunk@48057


git-svn-id: https://core.svn.wordpress.org/trunk@47824 1a063a9b-81f0-0310-95a4-ce76da25c4cd