*Steps to reproduce:*
# Create a node.
# Create or add manually a Blackboard variable type (any type).
# Edit the variable type to a VectorInt type (VectorInt2, VectorInt3).
# A warning is logged in console, warning the user of an invalid generic type used as BlackboardVariable type.
# Using the variable still works, despite the confusing warning.

*Actual results:* 

The following warning is logged in the console:
{code:java}
Invalid generic type for field TestVariable of type UnityEngine.Vector2Int on TestAction. BlackboardVariable types must derive from UnityEngine.Object.
UnityEngine.Debug:LogWarning (object)
Unity.Behavior.NodeRegistry:GetNodeVariables (System.Type) (at /com.unity.ai.designer-monorepo/Packages/com.unity.behavior/Authoring/UI/NodeRegistry.cs:304) {code}
*Expected results:* 

User should not get warned by using a type on their BlackboardVariable that we're supporting.

*Reproducible with versions:* 
1.0.3

*Not reproducible with versions:* 
1.0.2

*Tested on (OS):* 

*Notes:*
* Reported by a user here: [https://discussions.unity.com/t/behavior-package-1-0-7-released-changelog-inside/1573165/35]
* Can get a 100% repro by manually adding a VectorInt type to a custom node.