[Consider] Support custom Help Text on Link fields controlled by Linkit Module

[davidmpickett]

User Story or Problem Statement

As a UXer designing editorial interfaces in the Drupal CMS, I need to customize help text so I can make it relevant to the user's context.

Right now if I try to provide custom help text on a Link field that is using the LinkIt widget it won't show up on the interface. The default help text from the LinkIt module is shown instead.

The Facilities Team discovered this while working on #16327. @omahane created an upstream issue on the Drupal Module.

Acceptance Criteria

• Testable_Outcome_X
• Testable_Outcome_Y
• Testable_Outcome_Z
• Requires Content Model Documentation
• Requires design review
• Requires KB article update

Implementation steps

Design principles

[omahane]

@davidmpickett I created a merge request on the upstream issue. I would like to get your feedback there, if possible.

[omahane]

If we decide we want this and use a patch, we'll need to check for any links that may be overridden currently, such as field_url_of_an_online_event, which is currently overridden in EntityEventSubscriber: va_gov_events/src/EventSubscriber/EntityEventSubscriber.php

[davidmpickett]

@davidmpickett I created a merge request on the upstream issue. I would like to get your feedback there, if possible.

Feedback added!