This update for dcmtk fixes the following issues:

- Update to 3.7.0. See docs/CHANGES.370 for the full list of changes
  * CVE-2025-14841: invalid messages may trigger a segmentation fault due to a NULL pointer dereference (boo#1255292).
  * CVE-2025-14607: manipulation to component dcmdata could lead to memory corruption (boo#1255464).
- Avoid unnecessary dependencies (boo#1254123):