Allow use tag in SVG again

[thomasdax98]

Description

Allow use tag in SVG again

use can be used to define paths once in a SVG and then integrating them multiple times via anchor links: <use xlink:href="#path-id" />. This should not be prohibited.

Banning use caused problems for one of our clients when uploading SVGs because they use the pattern described above.

It's still not possible to use use to reference external files, since we still prohibit href and xlink:href attributes starting with http://, https:// and javascript:.

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Also fix a typing problem that lead to a type error in useDamFileUpload. This caused no error message to show up in the Admin when uploading a bad SVG. Instead, the upload progress bar was shown forever.

Acceptance criteria

• I have verified if my change requires an example
• I have verified if my change requires a changeset
• I have verified if my change requires screenshots/screencasts

Screenshots/screencasts

Before:

Bildschirmaufnahme.2025-02-27.um.09.31.03.mov

Now:

Bildschirmaufnahme.2025-02-27.um.09.30.39.mov

Further information

• Task: https://vivid-planet.atlassian.net/browse/PHSB2C-5794