Support for ca-west-1 (Calgary)

[jeremy-albuixech]

What happened:
We are trying to deploy a cluster in the new Canadian AWS region, ca-west-1 (Calgary).
Our external-dns pods are failing with the following errors (trimmed):

time="2024-05-07T17:48:33Z" level=warning msg="Could not find canonical hosted zone for domain [...].elb.ca-west-1.amazonaws.com. This may be because your region is not supported yet."
[....]
time="2024-05-07T17:48:34Z" level=error msg="Failed submitting change (error: InvalidChangeBatch: [RRSet of type CNAME with DNS name <redacted>. is not permitted at apex in zone <redacted>.]\n\tstatus code: 400, request id: [...]), it will be retried in a separate change batch in the next iteration"

What you expected to happen:
This should work and let us create records in that region.

How to reproduce it (as minimally and precisely as possible):
Try and use external-dns to create an ELB in that region.

Anything else we need to know?:

Environment:

• External-DNS version (use external-dns --version): v0.13.6
• DNS provider: Route53
• Others: