Please add an option to check for .us so this tool can be used for Commercial, GCC and GCC High tenants.

> Please provide us with the following information:
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### This issue is for a: (mark with an `x`)
```
- [ ] bug report -> please search issues before submitting
- [X] feature request
- [ ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)
```
Requesting this tool be made to check the GCC High urls listed at https://learn.microsoft.com/en-us/azure/active-directory/devices/howto-hybrid-azure-ad-join#government-cloud

### Minimal steps to reproduce
>

### Any log messages given by the failure
>

### Expected/desired behavior
> Check for all of the .US urls to make sure endpoints are able to Hybrid Join and enroll into Intune.

### OS and Version?
> Windows 7, 8 or 10. Linux (which distribution). macOS (Yosemite? El Capitan? Sierra?)

### Versions
>

### Mention any other details that might be useful

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> Thanks! We'll be in touch soon.

まず、TestDeviceRegConnectivity ツールのエンドポイントチェックと、リンクされている Microsoft の Government Cloud URL リストを確認します。サービス URL が定義されている場所と、接続結果がどのように報告されるかを特定します。ツールが Commercial、GCC、GCC High テナント用に要求された .us エンドポイントをチェックすれば完了です。

索引モデルが issue の本文から書いたものです。