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/modules/projectiles/guns/projectile.dm

@@ -1,16 +1,3 @@
-#define HOLD_CASINGS	0 //do not do anything after firing. Manual action, like pump shotguns, or guns that want to define custom behaviour
-#define EJECT_CASINGS	1 //drop spent casings on the ground after firing
-#define CYCLE_CASINGS 	2 //experimental: cycle casings, like a revolver. Also works for multibarrelled guns
-#define DELETE_CASINGS	3 //deletes the casing, used in caseless ammunition guns or something
-#define ROF_SMG 2 //ROF stands for "RATE OF FIRE"
-#define ROF_PISTOL 3
-#define ROF_INTERMEDIATE 4
-#define ROF_RIFLE 5
-#define ROF_HEAVY 8
-#define ROF_SUPERHEAVY 12	
-#define ROF_UNWIELDY 16
-#define ROF_SPECIAL 40
-
 /obj/item/gun/projectile
 	name = "gun"
 	desc = "A gun that fires bullets."

code/modules/projectiles/projectile.dm

@@ -681,3 +681,5 @@
 /image/proc/flick_remove_overlay(var/atom/A)
 	if(A)
 		A.overlays.Remove(src)
+
+#undef MUZZLE_EFFECT_PIXEL_INCREMENT