Chore: Integration test for the bug not possible to use OpenTofu as backend for Terragrunt via env0 Terraform provider (#974) (#976)

* chore: Integration test for the bug not possible to use OpenTofu as backend for Terragrunt via env0 Terraform provider

* chore: Integration test for the bug not possible to use OpenTofu as backend for Terragrunt via env0 Terraform provider

Co-authored-by: Marcelo Luiz Onhate <onhate@users.noreply.github.com>

Author: TomerHeber

tests/integration/036_environment_without_template_settings_terragrunt_opentofu/conf.tf

@@ -0,0 +1,15 @@
+terraform {
+  backend "local" {
+  }
+  required_providers {
+    env0 = {
+      source = "terraform-registry.env0.com/env0/env0"
+    }
+  }
+}
+
+provider "env0" {}
+
+variable "second_run" {
+  default = false
+}

tests/integration/036_environment_without_template_settings_terragrunt_opentofu/expected_outputs.json

@@ -0,0 +1 @@
+{}

tests/integration/036_environment_without_template_settings_terragrunt_opentofu/main.tf

@@ -0,0 +1,31 @@
+provider "random" {}
+
+resource "random_string" "random" {
+  length    = 8
+  special   = false
+  min_lower = 8
+}
+
+resource "env0_project" "project" {
+  name          = "project-environment-without_template-${random_string.random.result}"
+  force_destroy = true
+}
+
+resource "env0_environment" "environment" {
+  name              = "environment-without_template-${random_string.random.result}"
+  project_id        = env0_project.project.id
+  is_remote_backend = false
+  force_destroy     = true
+
+  without_template_settings {
+    description           = "Core Azure"
+    repository            = "https://github.com/env0/templates"
+    path                  = "terragrunt/misc/null-resource"
+    opentofu_version      = "1.8.1"
+    terragrunt_version    = "0.64.5"
+    type                  = "terragrunt"
+    revision              = "master"
+    is_terragrunt_run_all = true
+    terragrunt_tf_binary  = "opentofu"
+  }
+}