feat: switch tf to 1.5.3 and add new PEM for terraform-cicd-app

[dmitry-mightydevops]

Summary

1. Update tf to 1.5.3
2. Use new secret for the github app terraform-cicd-app used to perform github api calls from the terraform
3. I also removed git-crypt secrets from the terraform ns in the cloud cluster, as they clog the view.
4. Update your infra-dev-aws variables to become

old (not working):

variable "github_app_auth_pem_file" {
  description = "Github app auth, manage it: https://github.com/organizations/saritasa-nest/settings/apps/terraform-cicd-app"
  default     = "/keys/terraform-cicd-app.2022-11-18.private-key.pem"
  type        = string
}

new:

variable "github_app_auth_pem_file" {
  description = "Github app auth, manage it: https://github.com/organizations/saritasa-nest/settings/apps/terraform-cicd-app"
  default     = "/keys/terraform-cicd-app.2023-07-12.private-key.pem"
  type        = string
}


Pls update your saritasa helm repo locally with:

```sh
helm repo update saritasa