AVif images generated and served to thumbnail image althought it is > original image

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• Made sure you’re on the latest version=> 2.2
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Describe the bug
avif version is created for thumbnails although it is > than original image

To Reproduce
Steps to reproduce the behavior:

1. enable avif

2. upload this image
   

3. check uploads folder and media library => delete next-gen link displayed (shouldn't it be displayed when all next-gen are created?) , avif created to thumbnail images

Expected behavior
same as webP
avif which is > original image and thumbnail isnot served on FE

Screenshots
If applicable, add screenshots to help explain your problem.

Additional context
Add any other context about the problem here.

• while webP is enabled, no webP is created on trunk
• test page where avif is served with display image http://mai.rocketlabsqa.ovh/bigavif/
• if we click reoptimize using lossless, it will work fine and won't generate avif so the problem mainly when the image is already optimized

Acceptance Criteria (for WP Media team use only)
Clear instructions for developers, to be added before the grooming

Start by enabling AVIF and reproducing the issue with the linked image, then inspect the uploads folder and Media Library for generated thumbnail files and the next-gen link. Compare the behavior with WebP and with reoptimization using lossless; done means oversized AVIF thumbnails are not generated or served on the frontend, and the next-gen link behavior is correct.