Deployment manual is outdated, no clear guidance regarding start/stop/reinstall/upgrade

MariaDB-columnstore-engine package creates mariadb-columnstore service and it can be started with `sudo systemctl start mariadb;sudo systemctl start mariadb-columnstore`.

However, MariaDB-columnstore-cmapi removes this system service, and the `mcs` command should be used after cmapi installation (including API key creation `Mcs cluster set api-key --key ...`)

improper operation can cause crashes/freezes (see MCOL-5848, MCOL-5825)

The document https://mariadb.com/kb/en/columnstore-getting-started/ refers to the very old Columnstore 1.5 and says nothing about `mcs`. However, Community server contains Columnstore 23.10 now