Variants for each target

[noursandidb]

Background

Currently We have variants for one target, so we can have multiple environment like Dev, UAT, Prod...
But we don't support multiple variants for each Target

Solution

So let's say we have two targets A and B, and I want to have Dev, Prod for A with different values than Dev and Prod for B

It would be great if we have variants tag in our variants.yml as a child tag for each target

[arthurpalves]

This is related to #169