[MAINT]: Deprecate github_organization_custom_role and replace with github_organization_custom_repository_role and github_organization_custom_organization_role

[cailen]

Describe the need

Following up on #1069, it appears Github has decided to split custom roles out into two separate types now and was deprecated Sept 6, 2023 (see https://docs.github.com/en/enterprise-cloud@latest/rest/orgs/custom-roles?apiVersion=2022-11-28#deprecated---create-a-custom-role).

The current implementation (https://registry.terraform.io/providers/integrations/github/latest/docs/resources/organization_custom_role) I believe should be deprecated and replaced with the following:

Deprecated

• Resource: github_organization_custom_role
• Data source: github_organization_custom_role

Replacement

API endpoints found here: https://docs.github.com/en/enterprise-cloud@latest/rest/orgs/custom-roles?apiVersion=2022-11-28
Documentation: https://docs.github.com/en/enterprise-cloud@latest/organizations/managing-user-access-to-your-organizations-repositories/managing-repository-roles/about-custom-repository-roles
go-github source: https://github.com/google/go-github/blob/master/github/orgs_custom_roles.go

• Resource: github_organization_custom_repository_role
• Data source: github_organization_custom_repository_role

New

API endpoints found here: https://docs.github.com/en/enterprise-cloud@latest/rest/orgs/organization-roles?apiVersion=2022-11-28
Documentation: https://docs.github.com/en/enterprise-cloud@latest/organizations/managing-peoples-access-to-your-organization-with-roles/about-custom-organization-roles
go-github source: (It looks like this is not supported yet)

• Resource: github_organization_custom_organization_role
• Data source: github_organization_custom_organization_role

SDK Version

n/a

API Version

REST 2022-11-28

Relevant log output

No response

Code of Conduct

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