Add OpenTofu setup and configuration for AWS infrastructure

- Create action for setting up OpenTofu environment
- Update Terraform workflow to use OpenTofu for infrastructure management
- Modify backend configuration for S3 with new bucket and region
- Add S3 bucket resources with lifecycle configuration
- Update local variables and remove deprecated files
- Include required Python packages for OpenTofu

terraform/aws-iac/config.tf

@@ -1,5 +1,8 @@
 locals {
-  region               = "us-east-1"
+  region               = "eu-west-1"
   billing_alarm_limit  = 20
-  billing_alarm_emails = "c.alexandre.pires@gmail.com"
+  billing_alarm_emails = "c.alexandre.pires@alexpires.me"
+  account_id           = data.aws_caller_identity.current.account_id
 }
+
+data "aws_caller_identity" "current" {}