Add support for configuring System Log Filters

[LaurentGravier]

Is your feature request related to a problem? Please describe.

I would like to configure System Log Filters with DO.

Describe the solution you'd like

I would like to configure System Log Filters with DO.

Describe alternatives you've considered

As a workaround, we use tmsh commands.

Additional context

Example of the desired tmsh configuration
create sys log-config filter LFilt_Syslog level warn source all publisher Publi_Syslog
(remark : there are other possible parameters which we do not configure, like message-id).

[sunitharonan]

AUTOTOOL-4713 has been created and added to backlog