MNT Don't click on the block unnecessary in behat test

[GuySartorelli]

Fixes https://github.com/silverstripe/recipe-kitchen-sink/actions/runs/10033713755/job/27779110922

When I click "Add link" in the ".block-link-field" element # SilverStripe\BehatExtension\Context\BasicContext::iClickInTheElement()
element click intercepted: Element <span class="block-link-field__content--message-add-link">...</span> is not clickable at point (449, 633). Other element would receive the click: <div class="asset-dropzone flexbox-area-grow">...</div>

This is caused by clicking on the block when it's already expanded, which in the specific circumstances in the kitchen sink behat run results in clicking the upload field, opening the assets modal and therefore intercepting the above mentioned "click".

Issue

• Broken builds and merge-ups .github#285