Variable host_labels too restrictive

[draper7]

Issue:

When attempting to use labels that include dashes, host_labels validation fails.

https://github.com/terraform-ibm-modules/terraform-ibm-satellite/blob/main/modules/host/variables.tf#L12

Solution

Support dashes:

variable "host_labels" {
  description = "Host labels to assign host to control plane "
  type        = list(string)
  default     = null

  validation {
    condition     = can([for s in var.host_labels : regex("^[a-zA-Z0-9-:]+$", s)])
    error_message = "Label must be of the form `key:value`."
  }
}