Add owncloudsql config to authbasic

[butonic]

This PR allows configuring the authproviders to use the owncloudsql driver.

It allows running an ocis instance next to an already existing owncloud 10 and access the same database with an ocis.yaml config file like this

log:
  level: debug
  pretty: true
  color: true
proxy:
  account_backend: cs3
  enable_basic_auth: true
storage:
  reva:
    ########################################
    # first configure which drivers to use #
    ########################################
    #
    # list users using the owncloudsql driver
    users:
      driver: owncloudsql
    # auth users using the owncloudsql driver
    auth_provider:
      driver: owncloudsql
    # provide users storage using the owncloudsql driver
    storage_users:
      driver: owncloudsql
    #
    ########################################
    # first configure which drivers to use #
    ########################################
    #
    # the user_owncloud_sql config is used for user listing and auth
    user_owncloud_sql:
      db_username: owncloud
      db_password: owncloud
      db_host: mariadb
      #db_port: 
      db_name: owncloud
      idp: "https://cloud.ocis.test"
      #nobody: 
      #join_username: 
      #join_owncloud_uuid: 
      #enable_medial_search: 
    # the user_storage owncloud_sql config is used for the user storage owncloudsql config
    # ... jeez this is getting confusing
    user_storage:
      owncloud_sql:
        # make sure root points to the oc10 data directory. The below works for the official oc10 docker container
        root: /mnt/data/files
        #upload_info_dir: 
        db_username: owncloud
        db_password: owncloud
        db_host: mariadb
        #db_port: 
        db_name: owncloud
    # the sharing oc10-sql driver is mixed with the actual driver configuration
    # ... even more inconsistent as there is no seperate struct.
    # I hope this gets cleaned up when moving to go micro services
    sharing:
      #public_driver: oc10-sql
      user_driver: oc10-sql
      user_sql_username: owncloud
      user_sql_password: owncloud
      user_sql_host: mariadb
      #user_sql_port: 
      user_sql_name: owncloud

tracking in separate issues

• publicshare driver has no owncloudsql implementation, yet -> publicshare service has no owncloudsql driver implementation #3442
• rename user share oc10-sql to owncloudsql for consistency -> rename user share oc10-sql to owncloudsql for consistency #3443
• add the above config to docs not yet ... far to confusing and it needs an idp setup for the new libreidm as well

[sonarcloud]

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