Support Env Variables in Remote Schema URL

[PvtPuddles]

Hello. I would like to parameterize my remote_schema_url with environment variables (similar to remote_schema_headers), but it doesn't appear possible.

My use case is that our organization has several development systems and multiple production systems, and we typically switch between them using our .env files.

Ex:
.env

# REMOTE_SERVER="https://MyDomain.com"
REMOTE_SERVER="https://dev.MyDomain.com"

pyproject.toml

[tool.ariadne-codegen]
remote_schema_url = "${REMOTE_SERVER}/graphql"
remote_schema_headers = {"Authorization" = "$REMOTE_AUTHORIZATION"}