Major UT Overhaul (#16544)

* Removes old UT definition files (drone/travis)
* Adds concurrency definitions to the workflows
* Changes our workflows to be more in line with what /tg does
* Adds a workflow to build/commit TGUI
* Adds a workflow to build/commit changelogs

Add python version to dependencies.sh
Fix dme errors
Removes a bunch of not included files
Cache Opendream and add directory to check_grep.py

Co-authored-by: Werner <Arrow768@users.noreply.github.com>

code/game/objects/structures/gore/nest.dm

@@ -63,4 +63,6 @@
 	if(health <= 0)
 		var/final_message = replacetext(destroy_message, "THE STRUCTURE", "\The [src]")
 		visible_message(SPAN_WARNING(final_message))
-		qdel(src)
+		qdel(src)
+
+#undef NEST_RESIST_TIME

code/game/objects/structures/under_wardrobe.dm

@@ -1,9 +1,3 @@
-#define M_UNDER "Male underwear"
-#define F_UNDER "Female underwear"
-#define M_SOCKS "Male socks"
-#define F_SOCKS "Female socks"
-#define U_SHIRT "Undershirt"
-
 /obj/structure/undies_wardrobe
 	name = "underwear wardrobe"
 	desc = "Holds item of clothing you shouldn't be showing off in the hallways."