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/backend.tf

@@ -1,7 +1,7 @@
 terraform {
   backend "s3" {
-    bucket = "a13labs.infra"
-    key    = "aws-alarms.tfstate"
-    region = "us-east-1"
+    bucket = "a13labs.infra.eu"
+    key    = "aws.core.infra.tfstate"
+    region = "eu-west-1"
   }
 }