Change country to countryOrRegion to avoid political concern according to CELA

[t-bzhan]

Change country to countryOrRegion to avoid political concern according to CELA

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Changelog

Please ensure to add changelog with this PR by answering the following questions.

1. What's the purpose of the update?
   • new service onboarding
   • new API version
   • update existing version for new feature
   • update existing version to fix swagger quality issue in s360
   • Other, please clarify
2. When you are targeting to deploy new service/feature to public regions? Please provide date, or month to public if date is not available yet.
3. When you expect to publish swagger? Please provide date, or month to public if date is not available yet.
4. If it's an update to existing version, please select SDKs of specific language and CLIs that require refresh after swagger is published.
   • SDK of .NET (need service team to ensure code readiness)
   • SDK of Python
   • SDK of Java
   • SDK of Js
   • SDK of Go
   • PowerShell
   • CLI
   • Terraform
   • No, no need to refresh for updates in this PR

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• I commit to follow the Breaking Change Policy of "no breaking changes"
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• Removing API(s) in stable version
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[jessicl-ms]

If applicable, please update the examples files too.

[jorinmejia]

nit : change "country/region" to "country or region" to keep consistency.