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/unit_tests/component_tests.dm

@@ -1,12 +0,0 @@
-/datum/unit_test/component_duping/Run()
-	var/list/bad_dms = list()
-	var/list/bad_dts = list()
-	for(var/t in typesof(/datum/component))
-		var/datum/component/comp = t
-		if(!isnum(initial(comp.dupe_mode)))
-			bad_dms += t
-		var/dupe_type = initial(comp.dupe_type)
-		if(dupe_type && !ispath(dupe_type))
-			bad_dts += t
-	if(length(bad_dms) || length(bad_dts))
-		Fail("Components with invalid dupe modes: ([bad_dms.Join(",")]) ||| Components with invalid dupe types: ([bad_dts.Join(",")])")