Add regions ap-northeast-3 and eu-west-3 to AWS cloud provider #70252
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What type of PR is this?
/kind feature
/sig aws
What this PR does / why we need it:
Add regions ap-northeast-3 and eu-west-3 to the list of well known AWS regions.
Does this PR introduce a user-facing change?:
NONE. The aws cloudprovider can discover unknown regions from instance metadata. Although, in the case that we are not running on an ec2 instance and have not configured a region, but still need to validate whether a region is correct, then we can validate these newer regions correctly, though I don't know when this would happen.