Make Clusters spread hive weeds on Semi-Weedable surfaces. (#6616)

# About the pull request

This PR make clusters be able to spread on semi-weedable surfaces.

Gardener Drone weeds are weaker than hive weeds but can spread on
semi-weedable (core and pylon too) it dont make sense for clusters to
not be able to do same.


# Explain why it's good for the game

Make Cluster spread weeds on semi-weedable surfaces, it allow xenos in
some maps with lack of weedable surfaces like LV-624 grass on colony
side, and its not that powerfull, because xenos have limit of 8 cluster
per hive.

# Testing Photographs and Procedure

Unfold below to see visual gif(s).
<details>

Before:

![before](https://github.com/cmss13-devs/cmss13/assets/89580971/86818d76-f1a5-40aa-9a50-942d3b4911c3)

After:

![after](https://github.com/cmss13-devs/cmss13/assets/89580971/9b0ccbf7-0912-4a9d-86f1-a44ff045924f)

</details>

# Changelog
:cl:
balance: Enabled clusters to spread on semi-weedable surfaces.
/:cl:

code/modules/cm_aliens/weeds.dm

@@ -624,7 +624,7 @@
 	return
 
 /obj/effect/alien/weeds/node/pylon/cluster
-	spread_on_semiweedable = FALSE
+	spread_on_semiweedable = TRUE
 
 /obj/effect/alien/weeds/node/pylon/cluster/set_parent_damaged()
 	if(!resin_parent)