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/power/singularity/singularity.dm

@@ -1,4 +1,4 @@
-//This file was auto-corrected by findeclaration.exe on 25.5.2012 20:42:33
+#define I_SINGULO "singulo"
 
 /obj/singularity/
 	name = "gravitational singularity"
@@ -510,3 +510,5 @@
 	var/turf/destination = (direction == UP) ? GetAbove(src) : GetBelow(src)
 	if(destination)
 		forceMove(destination)
+
+#undef I_SINGULO