go-cleanarch: override infrastructure layer name

[mrsndmn]

Due to go-cleanarch readme default infrastructure layer package name is infrastructure or infra.

In this project infrastructure layer package named ports.

I filtered modules and layers from debug go-cleanarch output. There was no infrastructure layer

$ go-cleanarch -debug  ./ 2>&1 | grep -v 'Layer:}' | grep 'metadata: {Module' | cut -d' ' -f 6-7 | sort | uniq              
{Module:trainer Layer:application}
{Module:trainer Layer:domain}
{Module:trainer Layer:interfaces}
{Module:trainings Layer:application}
{Module:trainings Layer:domain}
{Module:trainings Layer:interfaces}

With overrided -infrastructure flag infrastructure layer appears in output

$ go-cleanarch -debug -infrastructure ports ./ 2>&1 | grep -v 'Layer:}' | grep 'metadata: {Module' | cut -d' ' -f 6-7 | sort | uniq
{Module:trainer Layer:application}
{Module:trainer Layer:domain}
{Module:trainer Layer:infrastructure}
{Module:trainer Layer:interfaces}
{Module:trainings Layer:application}
{Module:trainings Layer:domain}
{Module:trainings Layer:infrastructure}
{Module:trainings Layer:interfaces}