bug: Version Chooser error message is not being correctly parsed in frontend

[joaomariolago]

Bug description

When replicating #1015 in master, error prompt changes to:

But response payload contains a valid error message:

Steps to reproduce

1. Make sure to be running a recent master version
2. Have at least 2 images locally other than factory so bug: Can't delete image because there is no free space #1015 can be replicated
3. Fill the remaining SD card space using red-pill followed by a sudo fallocate -l 110G testfile.img (Change 110 to the max remaining size on SD card)
4. Go to BlueOS Version page and try to delete one image

Primary pain point(s)

Feedback given to user is not clear.

Additional context

Could be related to changes made in #3435 / #3605

[github-actions]

Yo, this issue might be related to:

• bug: Can't delete image because there is no free space #1015: same underlying disk space issue when deleting images
• version-chooser: Deleted images do not disappear view #1780: similar error handling problems with image deletion where ugly error messages were shown