Add width and alt tag to image in trial flow second step

What does this MR do and why?

Fix image size in the second step of the trial flow add an alt as per !78442 (comment 817445267)

Note: This visual issue only happens on Google Chrome/Chromium based browser.

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How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

1. Use Google Chrome
2. Login and go to http://localhost:3000/-/trials/select

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