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>

tools/bootstrap/python

@@ -9,9 +9,6 @@
 # and will create a standard virtualenv in which to install `requirements.txt`.
 set -e
 
-#Define Version
-PYTHON_VERSION=3.7.9
-
 # Convenience variables
 Bootstrap="$(dirname "$0")"
 Sdk="$(dirname "$Bootstrap")"
@@ -21,6 +18,7 @@ if [ "$TG_BOOTSTRAP_CACHE" ]; then
 fi
 OldPWD="$PWD"
 cd "$Bootstrap/../.."
+. ./dependencies.sh  # sets PYTHON_VERSION
 cd "$OldPWD"
 PythonVersion="$PYTHON_VERSION"
 PythonDir="$Cache/python-$PythonVersion"