IFC-1819 Fix utilization percentage of IP prefixes (#7388)

If all the IP addresses of a prefix used as a pool has been created,
marking the prefix as "not a pool" could end up in showing a percentage
of utilisation greater than 100%.

Author: gmazoyer

backend/infrahub/core/ipam/utilization.py

@@ -152,4 +152,4 @@ async def get_use_percentage(
             grand_total_space += prefix_total_space
         if grand_total_space == 0:
             return 0.0
-        return (grand_total_used / grand_total_space) * 100
+        return min((grand_total_used / grand_total_space) * 100, 100)

changelog/7388.fixed.md

@@ -0,0 +1 @@
+Fixed prefix utilization showing as greater than 100% after setting the pool attribute to false