OZG-2724 move oidc data to secret

src/main/helm/templates/oidc_client_secret.yaml

src/main/helm/templates/zufi_daten_sync_job.yaml

src/main/helm/values.yaml

src/test/helm/oidc_client_secret_test.yaml

src/test/helm/zufi_daten_sync_job_test.yaml