chore: (IAC-1196) Updated .tflint.hcl file to suppress the ssh_key error

Author: riragh

docs/CONFIG-VARS.md

@@ -191,7 +191,7 @@ Ubuntu 20.04 LTS is the operating system used on the Jump/NFS servers. Ubuntu cr
 | jump_rwx_filestore_path | File store mount point on jump server | string | "/viya-share" | This location cannot include `/mnt` as its root location. This disk is ephemeral on Ubuntu, which is the operating system being used for the jump/NFS servers. |
 | tags | Map of common tags to be placed on all Azure resources created by this script | map | { project_name = "sasviya4", environment = "dev" } | |
 | aks_identity | Use UserAssignedIdentity or Service Principal as  [AKS identity](https://docs.microsoft.com/en-us/azure/aks/concepts-identity) | string | "uai" | A value of `uai` wil create a Managed Identity based on the permissions of the authenticated user or use [`AKS_UAI_NAME`](#use-existing), if set. A value of `sp` will use values from [`CLIENT_ID`/`CLIENT_SECRET`](#azure-authentication), if set. |
-| ssh_public_key | File name of public ssh key for jump and nfs VM | string | null | Required with `create_jump_vm=true` or `storage_type=standard` |
+| ssh_public_key | File name of public ssh key for jump and nfs VM | string | "~/.ssh/id_rsa.pub" | Required with `create_jump_vm=true` or `storage_type=standard` |
 | cluster_api_mode | Public or private IP for the cluster api | string | "public" | Valid Values: "public", "private" |
 | aks_cluster_private_dns_zone_id | Specifies private DNS zone resource ID for AKS private cluster to use | string | "" | For `cluster_api_mode=private` if `aks_cluster_private_dns_zone_id` is not specified then the value `System` is used else it is set to null. For details see [Configure a private DNS zone](https://learn.microsoft.com/en-us/azure/aks/private-clusters?tabs=azure-portal#configure-a-private-dns-zone) |
 | aks_cluster_sku_tier | Optimizes api server for cost vs availability | string | "Free" | Valid Values:  "Free", "Standard" | 

linting-configs/.tflint.hcl

@@ -10,6 +10,7 @@
 config {
   # Enables module inspection.
   module = true
+  variables = ["ssh_public_key=null"]
 }
 
 plugin "azurerm" {

variables.tf

@@ -79,7 +79,7 @@ variable "fips_enabled" {
 variable "ssh_public_key" {
   description = "A custom ssh key to control access to the AKS cluster. Changing this forces a new resource to be created."
   type        = string
-  default     = null
+  default     = "~/.ssh/id_rsa.pub"
 }
 
 variable "default_public_access_cidrs" {