Make NodePool optional for LKE-E in python sdk

[rammanoj]

📝 Description

What does this PR do and why is this change necessary?

• Make node_pools argument in cluster_create optional for LKE-E clusters.

✔️ How to Test

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

• Create a standard cluster with below code and ensure that it fails with valueError

from linode_api4 import LinodeClient
from linode_api4.objects import LKECluster, LKENodePool

# creating for a new pool
client = LinodeClient("<token>", "https://api.linode.com/v4beta")
cluster = client.lke.cluster_create(
    label="demo-lke-cluster-pythons",
    region="us-ord",
    kube_version="v1.32",  # optional but recommended
    tier="standard")
print(f"Created cluster with ID: {cluster.id}")

# Output:
(lke-tools) ➜  tmp_python python3 main.py
Traceback (most recent call last):
  File "/Users/rpotla/Desktop/Codebase/test/tmp_python/main.py", line 6, in <module>
    cluster = client.lke.cluster_create(
              ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/rpotla/Envs/lke-tools/lib/python3.12/site-packages/linode_api4/groups/lke.py", line 124, in cluster_create
    raise ValueError("LKE standard clusters must have at least one node pool.")
ValueError: LKE standard clusters must have at least one node pool.

• Create a enterprise cluster with below code and ensure that if suceeds.

from linode_api4 import LinodeClient
from linode_api4.objects import LKECluster, LKENodePool

# creating for a new pool
client = LinodeClient("<token>", "https://api.linode.com/v4beta")
cluster = client.lke.cluster_create(
    label="demo-lke-cluster-pythons",
    region="us-ord",
    kube_version="v1.31.9+lke7",  # optional but recommended
    tier="enterprise")
print(f"Created cluster with ID: {cluster.id}")

# Outputs:
(lke-tools) ➜  tmp_python python3 main.py 
Created cluster with ID: 551042

[Copilot]

Pull request overview

This PR modifies the Python SDK to make the node_pools parameter optional when creating LKE Enterprise clusters, while maintaining the requirement for standard LKE clusters. The change reorders function parameters to place kube_version before node_pools and adds validation logic to enforce that standard clusters must have at least one node pool.

Key changes:

• Reordered parameters in cluster_create() to move kube_version before node_pools
• Added validation to require at least one node pool for standard tier clusters
• Made node_pools optional with an empty list default value

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
linode_api4/groups/lke.py	Reordered cluster_create parameters and added validation logic for standard vs enterprise cluster node pool requirements
test/unit/groups/lke_test.py	Added comprehensive unit tests for enterprise clusters without node pools and validation error cases
test/unit/objects/lke_test.py	Updated test calls to match new parameter order
test/unit/linode_client_test.py	Updated test calls to match new parameter order
test/integration/models/lke/test_lke.py	Updated integration test fixtures to match new parameter order
test/integration/linode_client/test_linode_client.py	Updated integration test to match new parameter order

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[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

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[Copilot]

This test validates case-insensitive tier comparison in the validation logic, but the assertion checks that the tier is passed through as-is to the API. Consider also asserting that node_pools is empty to ensure the validation logic correctly allows enterprise clusters without node pools regardless of case.

[ezilber-akamai]

Thanks for the contribution! Works well locally. Just need to fix the lint error.