Avoid wasted work creating body parts that are just going to be destroyed [0.3s of init] (#71916)

Current process:
- Human created
- Body parts created for basic human
- Species set
- Body parts torn down, recreated

New process:
- Human created
- Species set
- Body parts created then and there

I think the same is being done to organs, can be adjusted.

Set species was also being invoked asynchronously, but it's not clear
why, and SHOULD_NOT_SLEEP indicates nothing sleeps, so alas. This isn't
done for init, just for consistency.

Reorders init a little to accomodate the body parts not necessarily
being there, huds now need to safety check.

Saves about 0.3s of init. Closes
https://github.com/tgstation/dev-cycles-initiative/issues/18

code/modules/admin/create_mob.dm

@@ -28,7 +28,7 @@
 
 	human.dna.blood_type = random_blood_type()
 	human.dna.features["mcolor"] = "#[random_color()]"
-	human.dna.species.randomize_active_underwear(human)
+	human.dna.species.randomize_active_underwear_only(human)
 
 	for(var/datum/species/species_path as anything in subtypesof(/datum/species))
 		var/datum/species/new_species = new species_path