zabbix-proxy from home:smallindine project

For 15.6 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:smallindine/15.6/home:smallindine.repo
zypper refresh
zypper install zabbix-proxy

For 15.4 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:smallindine/15.4/home:smallindine.repo
zypper refresh
zypper install zabbix-proxy