Remove unsued Kustomize and run_uc.sh files

Files to remove:

• uc-application/overlay/*
• uc-workload-generator/overlay/*
• run_uc*.sh

In addition to removing these files, it should be checked whether everything is still working.

changed milestone to %0.3.0

added To Do modul/theodolite + 1 deleted label

added Master Project 20/21 label

removed 1 deleted label

closed with commit 6a451f64

mentioned in commit 6a451f64

removed To Do label

mentioned in commit 9d19a3c6