Image in product gallery doesn't have a focus outline indicator

[Manussakis]

Describe the bug

There is no focus outline indicator when the link that wraps the image in the product gallery is focused on.
This issue fails on the Focus Visible (Level AA) WCAG criterion.

Isolating the problem (mark completed items with an [x]):

• I have deactivated other plugins and themes and confirmed this bug occurs when only WooCommerce + Storefront theme are active.
• I can reproduce this bug consistently using the steps below.

To Reproduce

Steps to reproduce the behavior:

1. Go to a product page.
2. Tab navigate through the page until the focus stops on the link that wraps the image in the gallery.
3. No focus outline indicator is visible.

Screenshots

No outline focus indicator is visible.

Expected behavior

The link should get an outline focus when focused:

Browser Environment

Please provide as much detail as possible about your testing environment.

• Platform: macOS
• Browser(s): Chrome, Firefox, and Safari

WordPress Environment

Details

``` WordPress address (URL): http://woocommerce.test Site address (URL): http://woocommerce.test WC Version: 9.9.0-dev Legacy REST API Package Version: The Legacy REST API plugin is not installed on this site. Action Scheduler Version: ✔ 3.9.2 Log Directory Writable: ✔ WP Version: 6.8.1 WP Multisite: – WP Memory Limit: 256 MB WP Debug Mode: – WP Cron: ✔ Language: en_US External object cache: – ```