[FEAT]: Add support for GitHub Enterprise Cloud Data Residency

[EricDales]

Describe the need

Hello,

GitHub has released a new offer a few months ago, GitHub Enterprise Cloud Data Residency
URL of this new offer is dedicated to the customer and is different from github.com: https://customer-example.ghe.com
However the API is almost identical to github.com. When using BaseURL parameter, provider considers it's a GHES instance and adds a api/v3 subpath (or api/graphql)
In order to support this new flavor we need to detect ghe.com URL.

Thank you
Eric

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