[zliang-akamai]

📝 Description

Align integration test configuration with linodego and the Terraform provider by replacing the versioned LINODE_API_URL with an unversioned LINODE_URL and separate LINODE_API_VERSION. The test default remains v4beta; the production SDK client is unchanged. Document the configuration migration and cover the URL and version combinations with offline tests.

✔️ How to Test

python -m pytest --noconftest test/integration/linode_client/test_linode_client.py -k test_api_url_environment -q

[Copilot]

🟢 Approval recommended

No active review issues were identified for the integration-test API configuration migration.

No open issues 🎉

What changed in this PR

Aligns integration-test API configuration with linodego and the Terraform provider while leaving the production SDK client unchanged.

Changes:

• Replaces LINODE_API_URL with unversioned LINODE_URL and separate LINODE_API_VERSION, retaining the v4beta default.
• Adds offline tests for defaults, overrides, trailing slashes, and ignored legacy configuration.
• Documents the configuration migration.

File	Description
test/​integration/​linode_client/​test_linode_client.py	Adds parameterized API URL configuration tests.
test/​integration/​conftest.py	Builds the API URL from separate base URL and version variables.
README.rst	Documents defaults, usage, and migration from LINODE_API_URL.

_{Review effort: Balanced}