Mangrove logs use render type "cutout" which is inconsistent with other log types

Specifically Mangrove logs, not wood or stripped logs, use the render type `cutout` which is usually reserved for transparent blocks. This means that texture pixels with transparency will be rendered as see-through.

I've attached a resource pack that adds transparent textures to mangrove and oak logs to demonstrate the difference, as well as a screenshot to showcase this.