Add children datastore information under datastore cluster

[nikfot]

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Description

Currently the datastore cluster object only returns the id of the cluster. There is need to access the children of the cluster ( like supported in the gui under the tab datastores). With this PR we will enable the filtering of datastores based on the cluster object

Use Case(s)

In case the datastores are separated in clusters for some business reason, one would want to know which datastores are available under the required cluster, so the datastore choice will be made between them.

Potential Terraform Provider Configuration

main.tf:

data "vsphere_datastore_cluster" "datastore_cluster_data" {
  name          = var.vsphere_cluster_name
  datacenter_id = var.vsphere_dc_id
}

providers.tf:

provider "vsphere" {
  user                 = var.vcenter_name
  password             = var.vcenter_password
  vsphere_server       = var.vsphere_server
  allow_unverified_ssl = var.allow_unverified_ssl
}

terraform {
  required_providers {
    vsphere = {
      source  = "localhost/test/vsphere"
      version = "1.0.0"
    }
  }
}

outputs.tf:

output "all_ds" {
  value = data.vsphere_datastore_cluster.datastore_cluster_data.datastores
}

variables.tf:

variable "vsphere_cluster_name" {
  description = "Name of the vSpher cluster."
  type        = string
}

variable "vsphere_dc" {
  description = "Name of the vSpher datacenter you want to deploy the VM to."
  type        = string
}

variable "vsphere_dc_id" {
  description = "ID of the vSpher datacenter you want to deploy the VM to."
  type        = string
}

variable "vcenter_name" {
  description = "vSphere username"
  type        = string
}

variable "vcenter_password" {
  description = "Password for vCenter"
  type        = string
  sensitive   = true
}

variable "allow_unverified_ssl" {
  description = "Allow unverified ssl(true or false)"
  type        = bool
  default     = true
}

References

#2274

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