Handle errored.tfstate in Terraform workflow

[staticaland]

cloudposse/docs#358

If Terraform fails, errored.tfstate should be uploaded as an encrypted artifact.

[staticaland]

Inspiration:

https://github.com/0north/github_templates/blob/63202ba715e21f21d32474e36c6225c8eeafe9c6/.github/workflows/terraform-setup.yml#L244C15-L250

[staticaland]

Do solve this, move code from here: https://github.com/oslokommune/reusable-workflows/blob/main/.github/workflows/terraform_plan_apply_v2_beta.yml#L330

Test and verify.