new: Support Image Gen2 functionalities

[yec-akamai]

📝 Description

Support the new image fields, including tags, total_size, regions. Support image replication.

✔️ How to Test

Unite test:

make testunit

Before running the integration test, you'll need to set up these environment variables:

export LINODE_API_URL=https://.../v4
export LINODE_API_CA=$PWD/cacert.pem
export LINODE_TOKEN=...

Integration test:

make testint TEST_SUITE=linode_client
make testint TEST_SUITE=image TEST_CASE=test_image_create_upload
make testint TEST_SUITE=image TEST_CASE=test_get_image

# replication is not functional yet
# make testint TEST_SUITE=image TEST_CASE=test_image_replication

Manual Test

1. In a sandbox environment, run the following to create an image with tags:

import os
from linode_api4 import LinodeClient

client = LinodeClient(
        os.getenv("LINODE_TOKEN"),
        base_url="https://.../v4",
        ca_path=".../CA.pem",
)
    
linode, _ = client.linode.instance_create(
    "g6-nanode-1",
    "us-east",
    label="test-image-gen2",
    image="linode/alpine3.19",
)

image = client.image_create(
    disk=linode.disks[0].id, label="image-gen-2", description="Test", tags=["test", "image-gen2"]
)

print(image.tags)
print(image.total_size)
# regions is expected to be empty here since it's not properly functional yet
print(image.regions)

linode.delete()
image.delete()

2. Observe that new fields tags, total_size, and regions are populated.

[zliang-akamai]

Suggested change

	description: str = None,
	description: Optional[str] = None,

Same rule actually applied to str as well, lol

[zliang-akamai]

Overall looks great, and it's tested. Nice work!