cn-northwest-1 availability zones

[PatMyron]

similar to #1021

export AWS_DEFAULT_REGION=cn-north-1
aws ec2 describe-regions | pcregrep -o1 '"RegionName": "(.*)"' | xargs -L1 bash -c 'aws ec2 describe-availability-zones --region $0 | grep "ZoneName"' | grep "cn-"

            "ZoneName": "cn-north-1a",
            "ZoneName": "cn-north-1b",
            "ZoneName": "cn-northwest-1a",
            "ZoneName": "cn-northwest-1b",
            "ZoneName": "cn-northwest-1c",

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[codecov]

Codecov Report

Merging #1052 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1052   +/-   ##
=======================================
  Coverage   86.89%   86.89%           
=======================================
  Files         133      133           
  Lines        7892     7892           
  Branches     1947     1947           
=======================================
  Hits         6858     6858           
  Misses        640      640           
  Partials      394      394

Impacted Files	Coverage Δ
src/cfnlint/helpers.py	85.03% <ø> (ø)	⬆️

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