[Feature]: Allow to push to multiple environments at once

[andershagbard]

What area(s) will this request affect?

Theme

What type of change do you want to see?

New feature

Overview

I would like for Shopify CLI to be able to push to multiple environments at once. The syntax should be very similar to Theme Kit. E.g. theme push --env="*-production".

Motivation

Theme Kit has been deprecated, but Shopify CLI does not fill all needs and use cases Theme Kit solved.