feature: added support for china region

[james03160927]

Description

Fixes https://github.com/gruntwork-io/cloud-nuke/issues/126

TODOs

Read the Gruntwork contribution guidelines.

• [ ] Update the docs.
• [ ] Run the relevant tests successfully, including pre-commit checks.
• [ ] Ensure any 3rd party code adheres with our license policy or delete this line if its not applicable.
• [ ] Include release notes. If this PR is backward incompatible, include a migration guide.
• [ ] Attention Grunts - if this PR adds support for a new resource, ensure the nuke_sandbox and nuke_phxdevops jobs in .circleci/config.yml have been updated with appropriate exclusions (either directly in the job or via the .circleci/nuke_config.yml file) to prevent nuking IAM roles, groups, resources, etc that are important for the test accounts.

Release Notes (draft)

Added / Removed / Updated [X].

Migration Guide

[denis256]

Looks like changes are failing to compile

# github.com/gruntwork-io/cloud-nuke/aws/resources
aws/resources/ec2_placement_group.go:32:16: configObj.EC2PlacementGroups undefined (type config.Config has no field or method EC2PlacementGroups)
aws/resources/ec2_placement_group_types.go:41:19: configObj.EC2PlacementGroups undefined (type config.Config has no field or method EC2PlacementGroups)

[wakeful]

Rebasing should fix the problem

$ go build .
# github.com/gruntwork-io/cloud-nuke/aws/resources
aws/resources/ec2_placement_group.go:32:16: configObj.EC2PlacementGroups undefined (type config.Config has no field or method EC2PlacementGroups)
aws/resources/ec2_placement_group_types.go:41:19: configObj.EC2PlacementGroups undefined (type config.Config has no field or method EC2PlacementGroups)

$ git log feature/support-china-regions..master --oneline
4d997c4 (upstream/master, origin/master, origin/HEAD, master) fix: iam user exclude not working (#764)
0c6e8ba (tag: v0.37.2) add aws v2 sdk to support newer resources (#745) (#746)
45e4ac8 Fix config rule nuking (#762)
9f56e5a fix: nuke failure when route53 record NS exists with subdomain (#759)
c818032 Fix merge conflict issue (#761)

$ git rebase master
Successfully rebased and updated refs/heads/feature/support-china-regions.

$ go build .

$ echo $?
0

[james03160927]

Rebased again. Should be good now.