[PP-1] TypeError in removeExposedFiltersQueryParameters: exposed form in a div, not a form element

Problem/Motivation

Since Drupal core added removeExposedFiltersQueryParameters() to ajax_view.js (fix for #3121172), entity browser views with exposed filters throw a JavaScript error:

TypeError: parameter 1 is not of type 'HTMLFormElement'
    at Drupal.views.ajaxView.removeExposedFiltersQueryParameters

Core's removeExposedFiltersQueryParameters() calls new FormData($exposedForm.get(0)), which requires an HTMLFormElement. In entity browser, the view's exposed form is rendered as a <div> (not <form>) because it's nested inside the entity browser <form method="post">. Entity browser's entity_browser.view.js sets views_instance.$exposed_form to this <div>, then core's method fails.

Steps to reproduce

1. Create an entity browser with a view widget that has exposed filters.
2. Open the entity browser modal.
3. Use any exposed filter and press Search.
4. JavaScript error is thrown, AJAX request fails.

Proposed resolution

In entity_browser.view.js, override removeExposedFiltersQueryParameters on the views instance before calling attachExposedFormAjax (since it calls the method internally). When $exposedForm is not an HTMLFormElement, collect input names via jQuery's :input[name] selector instead of new FormData(). When it is a real <form>, delegate to core's original method.