data.harbor_project broke with 3.11.6+ and Harbor 2.13

[hcsaustrup]

Describe the bug
Something broken between 3.11.5 and 3.11.6, causing data.harbor_project to fail. Harbor version is 2.13.0 - not current, but should still be supported. Latest provider version has same issue.

  ╷
  │ Error: unexpected end of JSON input
  │
  │   with module.tenants3.module.repository_finalize["redacted"].data.harbor_project.this,
  │   on modules/tenants3/modules/repository-finalize/main.tf line 37, in data "harbor_project" "this":
  │   37: data "harbor_project" "this" {
  │
  ╵

To Reproduce

data "harbor_project" "this" {
  name = "project-that-exists"
}

Expected behavior
Expected Harbor project data to be pulled from Harbor without issues, like it did in version 3.11.5.

• Provider Version: 3.11.6
• Terraform Version: OpenTofu v1.11.6
• Harbor Version: 2.13.0-debian-12-r3