terraform tests: Set default replication factors

Follow-up to MaterializeInc#31452

Seen failing in https://buildkite.com/materialize/nightly/builds/11143#019501e1-d68b-407e-8801-4a60b5a18f5d

Author: def-

test/terraform/aws-temporary/main.tf

@@ -0,0 +1,117 @@
+# Copyright Materialize, Inc. and contributors. All rights reserved.
+#
+# Use of this software is governed by the Business Source License
+# included in the LICENSE file at the root of this repository.
+#
+# As of the Change Date specified in that file, in accordance with
+# the Business Source License, use of this software will be governed
+# by the Apache License, Version 2.0.
+
+provider "aws" {
+  region = "us-east-1"
+}
+
+resource "random_password" "db_password" {
+  length  = 32
+  special = false
+}
+
+module "materialize_infrastructure" {
+  source = "git::https://github.com/MaterializeInc/terraform-aws-materialize.git?ref=v0.2.0"
+
+  # Basic settings
+  # The namespace and environment variables are used to construct the names of the resources
+  # e.g. ${namespace}-${environment}-eks and etc.
+  namespace    = "aws-test"
+  environment  = "dev"
+  install_materialize_operator = true
+
+  helm_values = {
+      defaultReplicationFactor = {
+          system = 1
+          probe = 1
+          support = 1
+          analytics = 1
+      }
+  }
+
+  # VPC Configuration
+  vpc_cidr             = "10.0.0.0/16"
+  availability_zones   = ["us-east-1a", "us-east-1b"]
+  private_subnet_cidrs = ["10.0.1.0/24", "10.0.2.0/24"]
+  public_subnet_cidrs  = ["10.0.101.0/24", "10.0.102.0/24"]
+  single_nat_gateway   = true
+
+  # EKS Configuration
+  cluster_version           = "1.31"
+  node_group_instance_types = ["c7a.2xlarge"]
+  node_group_desired_size   = 2
+  node_group_min_size       = 1
+  node_group_max_size       = 3
+  node_group_capacity_type  = "ON_DEMAND"
+
+  # Storage Configuration
+  bucket_force_destroy = true
+
+  # For testing purposes, we are disabling encryption and versioning to allow for easier cleanup
+  # This should be enabled in production environments for security and data integrity
+  enable_bucket_versioning = false
+  enable_bucket_encryption = false
+
+  # Database Configuration
+  database_password    = random_password.db_password.result
+  postgres_version     = "15"
+  db_instance_class    = "db.t3.micro"
+  db_allocated_storage = 20
+  database_name        = "materialize"
+  database_username    = "materialize"
+  db_multi_az          = false
+
+  # Basic monitoring
+  enable_monitoring      = true
+  metrics_retention_days = 7
+
+  # Tags
+  tags = {
+    Environment = "dev"
+    Project     = "aws-test"
+    Terraform   = "true"
+  }
+}
+
+# Generate random suffix for unique S3 bucket name
+resource "random_id" "suffix" {
+  byte_length = 4
+}
+
+# outputs.tf
+output "eks_cluster_endpoint" {
+  description = "EKS cluster endpoint"
+  value       = module.materialize_infrastructure.eks_cluster_endpoint
+}
+
+output "database_endpoint" {
+  description = "RDS instance endpoint"
+  value       = module.materialize_infrastructure.database_endpoint
+}
+
+output "s3_bucket_name" {
+  description = "Name of the S3 bucket"
+  value       = module.materialize_infrastructure.s3_bucket_name
+}
+
+output "materialize_s3_role_arn" {
+  description = "The ARN of the IAM role for Materialize"
+  value       = module.materialize_infrastructure.materialize_s3_role_arn
+}
+
+output "metadata_backend_url" {
+  description = "PostgreSQL connection URL in the format required by Materialize"
+  value       = module.materialize_infrastructure.metadata_backend_url
+  sensitive   = true
+}
+
+output "persist_backend_url" {
+  description = "S3 connection URL in the format required by Materialize using IRSA"
+  value       = module.materialize_infrastructure.persist_backend_url
+}

test/terraform/aws/main.tf

@@ -21,6 +21,15 @@ module "materialize_infrastructure" {
   mz_iam_service_account_name = "terraform-aws-test-user"
   mz_iam_role_name = "terraform-aws-test-s3-role"
 
+  helm_values = {
+      defaultReplicationFactor = {
+          system = 1
+          probe = 1
+          support = 1
+          analytics = 1
+      }
+  }
+
   # VPC Configuration
   vpc_cidr             = "10.0.0.0/16"
   availability_zones   = ["us-east-1a", "us-east-1b"]

test/terraform/gcp/main.tf

@@ -41,7 +41,16 @@ module "materialize" {
     example     = "true"
   }
 
-  install_materialize_operator = false
+  install_materialize_operator = true
+
+  helm_values = {
+      defaultReplicationFactor = {
+          system = 1
+          probe = 1
+          support = 1
+          analytics = 1
+      }
+  }
 }
 
 variable "project_id" {