Link fields no longer get automatically overruled by using the custom view in D10

Problem/Motivation

Link fields no longer get automatically overruled by using the custom view in D10

Steps to reproduce

Create a link field in D10 and see that the autocomplete falls back to the default autocomplete

Proposed resolution

Change the removed hook `hook_field_widget_form_alter` to `hook_field_widget_single_element_form_alter`