Create a secure way to allow custom HTML elements and attributes in rewrite rules for Views

Problem/Motivation

Web components are becoming more popular
Web components allow you to create custom HTML elements
Custom elements and attributes are not able to be whitelisted
For structured content you can output the custom element in a twig template
However for some components it would be great to use the built-in Drupal rewrite functionality to map multiple items to a specific custom element
The rewrite functionality runs through the filterAdminXss which doesn't provide a way to pass allowlisted attributes
I've not found the cleanest way to implement this, but as components become more widely used this will need a more accessible way to safely allow web components to be used in rewrites and other places on a Drupal site

See attached views config for view with rewrite.
Here is the html that is output by the view:

<div class="view-content">
    <div class="views-row"><div class="views-field views-field-title">
        <span class="field-content">test basic page </span>
    </div></div>
</div>

Here is the expected output:

<div class="view-content">
    <div class="views-row"><div class="views-field views-field-title">
        <span class="field-content"><nic-component>test basic page </nic-component></span>
    </div></div>
</div>

Steps to reproduce

See attached view config.

• Fresh install
• Add basic page to site
• Create new view
• Create page display of content
• Unformatted list of fields
• Edit title field
• Override output of this field with custom text
• Enter: {{ title__value }}
• Apply
• Save

Proposed resolution

Provide a way to allowlist views rewrite custom html elements.

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet