Proposal: Separate `resource_github_organization_custom_properties` into separate resources per `value_type`

[deiga]

Describe the need

The schema doesn't currently map properly to the different value_types and their possibilities (for example: we can't set default values that are arrays #2806)

Instead of making the single resource very complex with conditional logic and some weird schema fields, I'd propose we create separate Org Custom Property resource for each value_type

SDK Version

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API Version

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Code of Conduct

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[github-actions]

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[stevehipwell]

I'm not sure this is worth the effort given that we can use a string array. When we can use the framework we can use dynamic types, so wouldn't want separate resources.