Lumosviridi v20 kubernetes updates (#6356)

Updates for v20+ and misc terraform bug fixes. Also refactored to use
terraform variables instead of locals which helps with readability and
ease of use for new users.

Terraform validation is currently passing:
![Screenshot 2024-07-21 at 13 18
37](https://github.com/user-attachments/assets/02aadc2d-d3f6-4e8b-9315-64e25191d9e6)

Additionally added [terraform-docs](https://terraform-docs.io/) to
generate a more helpful README for terraform specific configuration.

Raw K8s manifests were updated with changes for v20+ as well.

---------

Co-authored-by: Félix Malfait <felix.malfait@gmail.com>

packages/twenty-docker/k8s/manifests/ingress.yaml

@@ -20,5 +20,5 @@ spec:
         backend:
           service:
             name: twentycrm-server
-            port: 
+            port:
               name: http-tcp