Support `allow_pipeline_trigger_approve_deployment` for GitLab Project

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Summary

This MR provides support for the allow_pipeline_trigger_approve_deployment option for the gitlab_project data source and resource, resolving #4129 (closed) in the process.

The allow_pipeline_trigger_approve_deployment attribute was introduced in gitlab!111747 (merged), which is available from GitLab 15.10 and Premium/Ultimate tiers. In order to support this on the Terraform provider, the GitLab Go SDK had to be updated to include this attribute on the Project entity.

Related Issues

gitlab!111747 (merged) #4129 (closed)