Add support for default node pool's node_taints

[lonegunmanb]

Describe your changes

This pr added support for default_node_pool.node_taints argument.

Issue number

#299

Checklist before requesting a review

• The pr title can be used to describe what this pr did in CHANGELOG.md file
• I have executed pre-commit on my machine
• I have passed pr-check on my machine

Thanks for your cooperation!

[mloskot]

Shouldn't the default be [] instead of null? See #85

I'm observing the following plan changes (Terraform 1.3.7, hashicorp/azurerm 3.43.0, AKS K8s 1.25.5):

Note: Objects have changed outside of Terraform
    ...
    name                    = "nplin1"
    node_count              = 2
  + node_taints             = []
    tags                    = {
    ...

[lonegunmanb]

Thanks for asking @mloskot, for this argument I've checked the schema definition in AzureRM provider:

"node_taints": {
						Type:     pluginsdk.TypeList,
						ForceNew: true,
						Optional: true,
						Elem: &pluginsdk.Schema{
							Type: pluginsdk.TypeString,
						},
					},

Optional: true means the default value for this argument is null. As for the change you've seen in the plan, you can export the tfplan as json and check whether if there's any action generated for that change, as I've done in our test framework. If there's no action then we don't need to worry about it.

[mloskot]

@lonegunmanb Thanks for the explanation and suggestions. I'll try it out.

[jiaweitao001]

🚢