Slideshow Block: Align-wide results in image overlaps with several themes

Related to https://github.com/Automattic/jetpack/pull/25107

### Impacted plugin

Jetpack

### Steps to Reproduce

1. On a Jetpack-connected site install and activate the Twenty Twenty Two (or Blockbase, Hemingway, Twenty Sixteen, Astra) theme.
2. Add a Slideshow block, with various images of differing size.
3. Set the block alignment to Wide width.
4. In the editor (wp-admin), image navigation appears fine. The preview and live post however will show an image overlap for some of the images.
5. If you don't observe this behavior initially, try refreshing the page as well.

### A clear and concise description of what you expected to happen.

No image overlap in any theme.

Reported internally here: p8oabR-Uj-p2#comment-6501

### What actually happened

With the mentioned themes, there is image overlap for some of the images.

### Browser

Google Chrome/Chromium, Mozilla Firefox

### Other information

This is how it looks in the impacted themes, on the front-end:

### Platform (Simple, Atomic, or both?)

Self-hosted

### Reproducibility

Consistent

### Severity

Some (< 50%)

### Available workarounds?

_No response_

### Workaround details

_No response_

Reproduce the Slideshow block overlap on the front end using differing-size images, Wide alignment, and the listed themes, then trace the block's front-end layout behavior. Done means the images no longer overlap in the affected themes while editor navigation remains correct.

Written by the indexing model from the issue text.