Add availability zone id to ec2 metadata client #4398
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Summary
Adds implementation for the EC2 metadata client to fetch the availability zone ID.
https://docs.aws.amazon.com/whitepapers/latest/advanced-multi-az-resilience-patterns/appendix-a-getting-the-availability-zone-id.html
Implementation details
Update to the interface.
Testing
make test
New tests cover the changes: yes
Description for the changelog
Feature - Add EC2 metadata client support for availability zone ID.
Additional Information
Does this PR include breaking model changes? If so, Have you added transformation functions?
No.
Does this PR include the addition of new environment variables in the README?
No.
Licensing
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.