Add windows uninstall

Uninstall SimPol after test.

Since Windows runner reuses the same global variables, we need to uninstall SimPol after every run. Otherwise these errors might show up:

C:\GitLabRunner\builds\j1-fU-Vb\0\tum-fsd\simpol\simpol\3rdparty\wsclient\lib] 
[Warning: Name is nonexistent or not a directory:
C:\GitLabRunner\builds\Kx6oQvho\0\tulrfsd\models_tools\dev-process\simpol\simpol] 
[Warning: Name is nonexistent or not a directory:
C:\GitLabRunner\builds\Kx6oQvho\0\tulrfsd\models_tools\dev-process\simpol\simpol\3rdparty] 
[Warning: Name is nonexistent or not a directory:
C:\GitLabRunner\builds\Kx6oQvho\0\tulrfsd\models_tools\dev-process\simpol\simpol\3rdparty\passwordEntryDialog] 
[Warning: Name is nonexistent or not a directory:
C:\GitLabRunner\builds\Kx6oQvho\0\tulrfsd\models_tools\dev-process\simpol\simpol\3rdparty\wsclient] 
[Warning: Name is nonexistent or not a directory:
C:\GitLabRunner\builds\Kx6oQvho\0\tulrfsd\models_tools\dev-process\simpol\simpol\3rdparty\wsclient\lib] 
[Warning: Name is nonexistent or not a directory:
C:\GitLabRunner\builds\Kx6oQvho\0\tulrfsd\models_tools\dev-process\simpol\simpol\custom_rules] 
[Warning: Name is nonexistent or not a directory:
C:\GitLabRunner\builds\Kx6oQvho\0\tulrfsd\models_tools\dev-process\simpol\simpol\images] 
[Warning: Name is nonexistent or not a directory:
C:\GitLabRunner\builds\Kx6oQvho\0\tulrfsd\models_tools\dev-process\simpol\simpol\rmi_link_types] 

See this pipeline

Linux tests are running in the container and therefore do not need this.