Many `WP_List_Table` child classes in core use mostly the same code to create their "view" links markup. To DRY-up the code, a new `WP_List_Table->get_view_links` method is being introduced to consolidate the HTML link generation when provided an array of links.
This change also implements this new method in the relevant `WP_List_Table_xxx` child classes `get_views` methods. Finally, unit tests are being added to validate view links markup and test for some "unhappy paths".
Props afercia, costdev, garrett-eclipse, Dharm1025, juhise, peterwilsoncc.
Fixes#42066.
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