fix: issues with scripts, no aws (#4)

Fixes the following issues with the `web/git` Ansible scripts.

- Updates cache before installing `python3-pip`.
- Forces `terraform init` configuration during provisioning.
- Requires user to set an `endpoint_url` to get the backup file from S3.

In addition, I'm removing the last of AWS from the repository:

- The routing uses Hetzner now, so let's get rid of all of that.

Reviewed-on: #4
Co-authored-by: Max <git@maximhutz.me>
Co-committed-by: Max <git@maximhutz.me>

terraform/providers.tf

@@ -1,8 +1,8 @@
 terraform {
   backend "s3" {
     skip_credentials_validation = true
-    skip_region_validation = true
-    skip_requesting_account_id = true
+    skip_region_validation      = true
+    skip_requesting_account_id  = true
   }
 
   required_providers {
@@ -21,4 +21,4 @@ provider "aws" {
   region     = var.aws_region
   access_key = var.aws_access_key
   secret_key = var.aws_secret_key
-}
+}