Custom provider source repo

[malarinv]

What happened?

Currently the template hard-codes github.com/crossplane-contrib/ without ability to update the source prefix with environment variables like ProviderNameUpper | ProviderNameLower. Also why not use env vars for the following as well in the docs instead of editing Makefile?

export TERRAFORM_PROVIDER_SOURCE := hashicorp/null
export TERRAFORM_PROVIDER_VERSION := 3.1.0
export TERRAFORM_PROVIDER_DOWNLOAD_NAME := terraform-provider-null
export TERRAFORM_PROVIDER_DOWNLOAD_URL_PREFIX

How can we reproduce it?

clone template and follow guide

What environment did it happen in?

Crossplane version: 1.7
Provider version: 3.1.0
Terrajet version: 0.4.2
Terraform version: 1.1.6