Skip generating smaller Design Management designs for TIFFs

What does this MR do?

This MR skips generating smaller Design Management designs for TIFFs.

Our ability to enable the feature to generate smaller design images #207351 (closed) was blocked when it was discovered that our servers did not have the ability to generate smaller images for JPG or TIFF designs #207740 (closed).

The developer who is working on allowing our infrastructure to resize images has enabled JPGs to be resized in production, however TIFF support may take a couple more weeks #207740 (comment 316655702).

We've decided to make a change to skip resizing TIFFs for now, and then go ahead and enable the resizing feature, rather than to hold it up any longer. We can then do #213470 as a follow-up issue to enable TIFF when we have it.

• Issue: #213468 (closed)

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry #207351 (comment 291999117)
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• [-] Tested in all supported browsers
• [-] Informed Infrastructure department of a default or new setting change, if applicable per definition of done