Terraform backend

[SamuelBeaurepaire]

Description

We (RTS Digital) now have and use a single common Terraform backend (S3 bucket + DynamoDB table) for all our terraform deployments.
We suggest to use this new backend for this repo as well.

Changes Made

• Changed the Terraform backend configuration in all modules except 01-terraform-backend
• Added the "srg-repository" tag to AWS resources deployed by Terraform

Actions needed

1. Add this profile to your ~/.aws/config

[profile services-prd]
sso_start_url = https://srgssr.awsapps.com/start
sso_region = eu-central-1
sso_account_id = 404557912613
sso_role_name = Contributor

2. Perform a terraform init -migrate-state in each module except 01-terraform-backend
3. Perform a terraform plan in each module to check everything is alright
4. Perform a terraform destroy in 01-terraform-backend module if its resources are actually unused
5. Create a new PR to delete the 01-terraform-backend module files and update the project README accordingly

Checklist

• I have followed the project's style and contribution guidelines.
• I have performed a self-review of my own changes.
• I have made corresponding changes to the documentation.
• I have added tests that prove my fix is effective or that my feature works.

[jboix]

Looks good to me! I'll create a separate Pull Request to remove the backend configuration since its no longer needed.