When various methods parameters in child classes were renamed to `$item` to match the parent class for PHP 8 named parameter support, most of the methods restored the more descriptive, specific name at the beginning for better readability, with several exceptions for methods consisting only of a few lines.
To avoid confusion about why some methods do that and some don't, this commit aims to bring more consistency to the code, specifically in list tables' `::column_default()` methods.
Follow-up to [51728], [51737], [51786].
See #58831.
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