Coding Standards: PHP short ternary operator syntax is not allowed.

WPCS 2.2.0 added a sniff for detecting short ternary operator syntax, which is not allowed per the Core handbook.

Follow up of [47927].
Fixes #50258.
Built from https://develop.svn.wordpress.org/trunk@47929


git-svn-id: https://core.svn.wordpress.org/trunk@47702 1a063a9b-81f0-0310-95a4-ce76da25c4cd