OZG-6741 remove new s from Organisationseinheit

src/main/helm/templates/deployment.yaml

...n/organisationseinheit/OrganisationEinheitProperties.java

...ganisationseinheit/OrganisationsEinheitRootProcessor.java

src/test/helm/deployment_features_test.yaml

src/test/helm/deployment_zufi_test.yaml

...tionseinheit/OrganisationsEinheitRootProcessorITCase.java

...sationseinheit/OrganisationsEinheitRootProcessorTest.java