PLT-1848: Update AZS as required feild for maas cluster (#633)

Author: SivaanandM

docs/resources/cluster_maas.md

@@ -175,6 +175,7 @@ Required:
 
 Required:
 
+- `azs` (Set of String) Availability zones in which the machine pool nodes to be provisioned.
 - `count` (Number) Number of nodes in the machine pool.
 - `instance_type` (Block List, Min: 1, Max: 1) (see [below for nested schema](#nestedblock--machine_pool--instance_type))
 - `name` (String) Name of the machine pool.
@@ -183,7 +184,6 @@ Required:
 Optional:
 
 - `additional_labels` (Map of String) Additional labels to be applied to the machine pool. Labels must be in the form of `key:value`.
-- `azs` (Set of String) Availability zones in which the machine pool nodes to be provisioned.
 - `control_plane` (Boolean) Whether this machine pool is a control plane. Defaults to `false`.
 - `control_plane_as_worker` (Boolean) Whether this machine pool is a control plane and a worker. Defaults to `false`.
 - `max` (Number) Maximum number of nodes in the machine pool. This is used for autoscaling the machine pool.

spectrocloud/resource_cluster_maas.go

@@ -233,7 +233,7 @@ func resourceClusterMaas() *schema.Resource {
 						},
 						"azs": {
 							Type:     schema.TypeSet,
-							Optional: true,
+							Required: true,
 							Set:      schema.HashString,
 							Elem: &schema.Schema{
 								Type: schema.TypeString,