fix: Remove negation from redis install condition

[vijay-wandb]

Redis is being created even though create_redis is explicitly set to false in the deployment using the GCP Terraform module public-dns-with-cloud-dns.

Here’s the variable definition:

variable "create_redis" {
  default     = false
  description = "Boolean indicating whether to provision a Redis instance (true) or not (false)."
  nullable    = false
  type        = bool
}

The logic in the module at main.tf#L362 appears to cause the issue:

redis = { install = !var.create_redis }

[danielpanzella]

The create_redis variable when set to true will create a managed redis instance and disable the in cluster redis, as well as wire through the appropriate connection information.