Add label to nodepool

[rammanoj]

📝 Description

• Add label to nodepool
• Remove redundant assigning of label and taint while creation

✔️ How to Test

What are the steps to reproduce the issue or verify the changes?

• Run pip install . to install the PR in the local environment.
• Create an LKE-E Cluster and use the below config to create a nodePool with a label.
• Create a NodePool with a label using the following code and ensure created nodes contain the label in their name.

client = LinodeClient("<api-token>", "https://api.linode.com/v4beta")
cluster = LKECluster(client, <cluster-id>)
node_pool = cluster.node_pool_create("g6-dedicated-2", 3, label="my-node-pool")
print(node_pool)

• Update the nodePool, set label to some other value using the following code and ensure the newly created linodes are reflected accordingly.

# set node pool to any other value and increase count so that newly booted machine comes up with updated value
client = LinodeClient("<api-token>", "https://api.linode.com/v4beta")
cluster = LKECluster(client, <cluster-id>)
node_pool = LKENodePool(client,<cluster-id>, <nodepool-id>)
node_pool.label = "other-123-label"
node_pool.count = 4
node_pool.save()

• Update the nodePool, set label to some other value using the following code and ensure the newly created linodes are reflected accordingly.

# set node pool to any other value and increase count so that newly booted machine comes up with <cluster-id>-<nodepool-id>-<hash>
cluster = LKECluster(client, <cluster-id>)
node_pool = LKENodePool(client,<cluster-id>, <nodepool-id>)
node_pool.label = ""
node_pool.count = 5
node_pool.save()

How do I run the relevant unit/integration tests?

• Run tox

📷 Preview

If applicable, include a screenshot or code snippet of this change. Otherwise, please remove this section.

[zliang-akamai]

Looks good!

[jriddle-linode]

LGTM and works locally, thank you.