Add some missing sounds for mobs (#4875)

- Eating sound for Sheep (file already here)
- Damage sound for Sheep
  - mobs_mc_sheep_damage.ogg all taken from https://freesound.org/people/Breviceps/sounds/644830/ released under CC0
- More random baa sounds for Sheep
  - mobs_mc_sheep_random.1.ogg is taken from here https://freesound.org/people/michaelperfect/sounds/710298/ and is released under CC0
  - mobs_mc_sheep_random.2.ogg is taken from here https://freesound.org/people/satoristudios3/sounds/677221/ and is released under CC0
- Footsteps for Skeletons fixed
- Random Sounds for Skeletons fixed
- Sounds for Iron Golem
  - mobs_mc_iron_golem_clank_damage.1.ogg comes from https://freesound.org/people/F.M.Audio/sounds/616200/ CC-BY-4.0
  - mobs_mc_iron_golem_clank_damage.2.ogg comes from https://freesound.org/people/F.M.Audio/sounds/620435/ CC-BY-4.0
  - mobs_mc_iron_golem_clank_damage.3.ogg comes from https://freesound.org/people/F.M.Audio/sounds/620830/ CC-BY-4.0
  - mobs_mc_iron_golem_death.ogg taken from https://freesound.org/people/yottasounds/sounds/175180/ under cc-by-3.0
  - mobs_mc_iron_golem_random.1.ogg taken from https://freesound.org/people/LemmaEOF/sounds/538065/ under cc-by-4.0
  - mobs_mc_iron_golem_random.2.ogg taken from  https://freesound.org/people/newagesoup/sounds/337841/ released under CC0

Reviewed-on: https://git.minetest.land/VoxeLibre/VoxeLibre/pulls/4875
Reviewed-by: kno10 <kno10@noreply.git.minetest.land>
Co-authored-by: SmokeyDope <smokey@tilde.team>
Co-committed-by: SmokeyDope <smokey@tilde.team>

mods/ENTITIES/mobs_mc/iron_golem.lua

@@ -33,7 +33,12 @@ mcl_mobs.register_mob("mobs_mc:iron_golem", {
 	},
 	visual_size = {x=3, y=3},
 	makes_footstep_sound = true,
-	-- TODO: sounds
+	sounds = {
+		random = "mobs_mc_iron_golem_random",
+		death = "mobs_mc_iron_golem_death",
+		damage = "mobs_mc_iron_golem_clank_damage",
+		distance = 16,
+    },
 	view_range = 16,
 	stepheight = 1.1,
 	owner = "",

mods/ENTITIES/mobs_mc/sheep.lua

@@ -92,9 +92,9 @@ mcl_mobs.register_mob("mobs_mc:sheep", {
 	},
 	fear_height = 4,
 	sounds = {
-		random = "mobs_sheep",
+		random = "mobs_mc_sheep_random",
 		death = "mobs_sheep",
-		damage = "mobs_sheep",
+		damage = "mobs_mc_sheep_damage",
 		sounds = "mobs_mc_animal_eat_generic",
 		distance = 16,
 	},
@@ -149,6 +149,11 @@ mcl_mobs.register_mob("mobs_mc:sheep", {
 				self.object:set_velocity(vector.zero())
 				self.gotten = false
 				self.object:set_properties({ textures = self.base_texture })
+				minetest.sound_play({name="mobs_mc_animal_eat_generic", gain=0.4}, {
+				pos = pos,
+				gain= 0.4,
+				max_hear_distance = 16,
+				}, true)
 			end
 		end)
 

mods/ENTITIES/mobs_mc/skeleton+stray.lua

@@ -38,6 +38,7 @@ local skeleton = {
 		"mobs_mc_skeleton.png", -- skeleton
 	} },
 	makes_footstep_sound = true,
+	walk_velocity = 1,
 	textures = {
 		{
 			"mobs_mc_empty.png", -- armor
@@ -47,7 +48,7 @@ local skeleton = {
 	},
 	-- TODO: change random to new api when min minetest version is 5.8
 	sounds = {
-		random = "mobs_mc_skeleton_random.2",
+		random = "mobs_mc_skeleton_random",
 		death = "mobs_mc_skeleton_death",
 		damage = "mobs_mc_skeleton_hurt",
 		distance = 16,