fix(gatsby-remark-images-contentful): make clear error when loading non-existent image

[hoangvvo]

Description

The gives clear error if the plugin fails to load an image instead of an unambiguous axios error

Documentation

n/a

Related Issues

Close #21487

[wardpeet]

Awesome! This looks great, thanks for putting in the work 💪. I'll publish on Monday

[gatsbot]

Holy buckets, @hoangvvo — we just merged your PR to Gatsby! 💪💜

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[hoangvvo]

Awesome! This looks great, thanks for putting in the work . I'll publish on Monday

Thanks for fixing the test! So sorry I did not get a chance to look at it.

[wardpeet]

Published in gatsby-remark-images-contentful@2.1.32

No worries, thanks for doing the work!