hide field handle for entryType

[i-just]

Description

PR #13138 added missing validation messages to the meta fields. In the process, it was necessary to add the attribute param to the Entry Type select field to trigger the containing div to have the data-attribute="typeId" attribute, which is needed for the validation errors to show in a slideout.

Adding attribute, however, makes the field handle show for the Entry Type field when the user has “Show field handles in edit forms” enabled, and this wasn’t the case before (nor should it be).

This PR removes the attribute from the Entry Type select field and replaces it with fieldAttributes[data][attribute], which will give the field container the correct attribute for the error messages to show in a slideout, without making the field handle show.

Related issues

#13627

[brandonkelly]

Fixed this in a different way via 565eaa2 – I’d rather have CustomField have to do a little extra work explicitly stating that its “attribute” should be shown on edit forms, rather than make every other field layout field have to identify its attribute in a more complicated way.