[Social Link]: Correctly position the link popover when List View is open

[stacimc]

Description

Issue #30120

When the List View is open in the site editor, if you click on an icon in the Social Icons block to edit the url, the popover will float quite far away from the block. This PR updates the block to pass an anchorRef to the URLPopover so that it can correctly position the control even when the List View is open.

How has this been tested?

(See screenshots)

1. In the site editor, add a Social Icons block and add a few icons.
2. Click on one of the icons to edit the url. Notice that the popover is positioned as expected, by the element being edited.
3. Open the List View and click on another icon. Verify that the popover is still positioned correctly.

Screenshots

Before	After

Types of changes

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• I've tested my changes with keyboard and screen readers.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).

[aaronrobertshaw]

Nice work! ✨

I could replicate the issue prior to applying this PR. Afterwards, the link popover position is much better in the site editor. The block editor was unaffected.

Before

After

The e2e failures look unrelated. I'll re-run those and when they pass, I'm happy to merge this 👍