Add task to install zabbix-agent2-plugin-* (or a subset)

[Thulium-Drake]

SUMMARY

Currently the role can install zabbix-agent(2), zabbix-get and zabbix-sender. But zabbix-agent2 comes with a few extra plugins (only postgresql and mongodb) for now.

Can the zabbix_agent2_plugins variable be extended to also support the installation of additional packages? Something along the lines of:

zabbix_agent2_plugins:
  - name: PostgreSQL
    package: zabbix-agent2-plugin-postgres

ISSUE TYPE

• Feature Idea

COMPONENT NAME

zabbix_agent

ADDITIONAL INFORMATION

[linceaerian]

I also recommend this, I remember the problem where the first embedded plugins where removed during a minor update which led to "why" there's only those as default :)
Seems like there's still problem for the "plugin" management, I did not find the instruction to install them either, I searched in:
https://www.zabbix.com/documentation/current/en/manual/appendix/config/zabbix_agent2_plugins/postgresql_plugin

Seems like a yum search gave me my answer but there's a bit of a need to improve the doc around the plugins ;)

It would be perfect to continue have code indifferent from the system, ex, currently i'll need to add ansible code for the deps for ubuntu (or not cause default included), redhat (yum), etc.