Deprecate emails_disabled and replace it with emails_enabled on gitlab_project

New Data Source / Resource

The emails_disabled has been deprecated in the projects API and it is recommended to use the emails_enabled attribute.

(Deprecated) Disable email notifications. Use emails_enabled instead

Related GitLab APIs

API documentation: https://docs.gitlab.com/ee/api/projects.html#create-project

Additional Details

• GitLab REST API resources available
• go-gitlab does support the related GitLab API already
• I'd like to contribute it myself