Slideshow block: Swiping images in editor not possible with block-based theme plus Gutenberg plugin

### Issue

If a site has the Gutenberg plugin active (any version compatible with current Jetpack versions), and a block-based theme active, then it becomes impossible to swipe images in a Slideshow block, but only within the editor.

### To replicate

* On a self-hosted site, ensure the Gutenberg plugin is active (any version compatible with the current Jetpack version - I tested down to 17.5). Same on WoA (and on Simple this is the default).
* Install and activate a block-based theme such as Twenty Twenty Four.
* Add a Slideshow block to a post, with several images added.
* Try to swipe through images in the slideshow, within the post editor - it shouldn't be possible.
* Install and activate a legacy theme such as Twenty Fifteen, with Gutenberg still active.
* Try to swipe through images in the slideshow - it should now be possible.

### Other notes

Another issue occurs in the same environments (block-based theme, Gutenberg plugin active), and that is related to images appearing to be 'stuck' to the mouse: https://github.com/Automattic/jetpack/issues/37407