Wrangler deletes environment variables set by Terraform configuration on deployment of Pages project

[alex35mil]

Describe the solution

When managing infrastructure with Terraform and deploying Pages project with Wrangler, the latter messes up configuration set by the former.

For example, I set env vars in pages project via Terraform config and then build/deploy code using Wrangler CLI. On deployment, Wrangler deletes all env vars set by the Terraform (except for the secrets). keep_vars/--keep-vars is not available for Pages deployment.