[3.5.0-pre] Group compound warning triggers for Svelto base types

[g-jozsef]

Group compound/tag Svelto.ECS.GroupTag1[....] is not sealed. GroupCompounds and Tags cannot be inherited, consider marking it s
ealed`

The problem seems to be that `` is called recursively and the base svelto GroupTag and compound is also checked when they obviously can't be sealed.

Svelto.ECS/com.sebaslab.svelto.ecs/Core/Groups/GroupHashMap.cs

Line 111 in bc53d38

$"Group compound/tag {type} is not sealed. GroupCompounds and Tags cannot be inherited, consider marking it sealed");

[sebas77]

fixed