Infoblox SSoT plugin "Prefix -> VLAN" relationship source label conflicts with ipam:prefix model

[michalbil]

Environment

• Python version: 3.11.11
• Nautobot version: 2.4.3
• nautobot-ssot version: 3.5.0
• nautobot-design-builder: 2.1.0

Expected Behavior

Design builder jobs that create an object with a prefix complete successfully.

Observed Behavior

Any design builder job that creates a prefix will fail because of relationship's source label conflict with ipam:prefix attribute.

Jobs fail with:

Prefix None failed validation
prefix_length: This field cannot be null.

Steps to Reproduce

1. Infoblox integration installed.
2. Create a design job that creates a prefix.
3. Create a relationship from prefix to some other model and name the prefix side label prefix.
4. Run the design job.

[progala]

Tagging this as a bug as those labels are incorrect in the first place so we'll get them fixed as part of the PR for this.