Default parrot textures have white background instead of transparent

MC-242395 Texture map for the blaze (blaze.png) contains unused pixels Resolved MC-242396 Unused pixels in wood.png UV texture map for armor stands Resolved MC-242397 Texture maps for cow, red & brown mooshroom (red/brown_mooshroom.png & cow.png) contain unused pixels Resolved MC-242398 Unused pixels in sheep.png UV texture map Reopened MC-242591 Unused pixels in white/gray.png UV texture maps for llama varients Reopened MC-242592 Texture map for the polar bear (polarbear.png) contain unused pixels Resolved MC-248553 Texture map for villager types contain unused pixels Open MC-248554 Unused pixels in lead_knot.png UV texture map Open MC-248562 Iron golem has unused pixels in the texture Resolved MC-251254 Unused pixels in end rod texture Open MC-257432 Ravagers have unused pixels in their texture Open