Prompt: Migrate the `gitlab_pipeline_trigger` resource (defined in internal/provider/sdk/resource_gitlab_pipeline_trigger.go) from the old SDK to the new terraform Framework plugin. Use https://gitlab.com/gitlab-org/terraform-provider-gitlab/-/merge_requests/2936 as an example of what to do, excluding the state mover. Acceptance Criteria: Functionality for the Read/Create/Update/Delete functions should be the same as the old SDK resource. Tests should be equal between the two resources. There should be a new test in the same file, checking that users can migrate from the old to the new version without errors.