Include the need to use global transform in kinematicbody2d description of the "test_move" method

**Your Godot version:**
3.2.3 stable
**Issue description:**
The description of the method "test_move" states "...position, scale and rotation to that of the given Transform2D."
Would like to propose changing it to:
"...position, scale and rotation to that of the given global Transform2D."
This would indicate that a global transform has to be used as opposed to the current version that leaves that point open.

**URL to the documentation page (if already existing):**
https://docs.godotengine.org/en/stable/classes/class_kinematicbody2d.html?#class-kinematicbody2d-method-test-move