feat: add github_enterprise_actions_hosted_runner

[nico34638]

Resolves #3016

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Before the change?

• No possibility to create hosted runner at enterprise level

After the change?

• It's possible

Pull request checklist

• Schema migrations have been created if needed (example)
• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)

Does this introduce a breaking change?

Please see our docs on breaking changes to help!

• Yes
• No

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[github-actions]

👋 Hi! Thank you for this contribution! Just to let you know, our GitHub SDK team does a round of issue and PR reviews twice a week, every Monday and Friday! We have a process in place for prioritizing and responding to your input. Because you are a part of this community please feel free to comment, add to, or pick up any issues/PRs that are labeled with Status: Up for grabs. You & others like you are the reason all of this works! So thank you & happy coding! 🚀

[deiga]

Hey @nico34638 👋

Thank you very much for your contribution! We're currently working on a major release of the provider and that will possibly delay getting this PR merged.

While that's happening, could I bother you for a few changes?

• We're moving towards using Context-aware provider functions (ReadContext, CreateContext, etc.). Could you refactor your PR to use those? :)
• Another major upcoming change will be generating docs based on Schema contents. Could you ensure that all levels of the Schema have Description fields which contain all necessary information for the docs?

Support for Hosted runners for enterprises was added in v70 of go-github. Our upcoming major release will upgrade to v77. Could you rebase your branch on top of #2891 and use the SDK methods instead of manual HTTP requests? :)