BrAPI: Observation Units - fix duplicate plots due to Management Factors

[dwaring87]

Description

This removes the duplicate plots in the BrAPI /observationUnits endpoint due to management factors.

The response now looks like this:

{
  "result": {
    "data": [
      {
        "observationUnitName": "SAMPLE_EXANY_RW_2022-PLOT_101",
        "treatments": [
          {
            "modality": "Description of MF A",
            "factor": "SAMPLE_EXANY_RW_2022_MFA"
          },
          {
            "factor": "SAMPLE_EXANY_RW_2022_MFC",
            "modality": "Description of MF C"
          }
        ],
        ...
      },
   ]
  },
  "metadata": {
    "pagination": {
      "totalPages": 3,
      "pageSize": 10,
      "currentPage": 0,
      "totalCount": 30
    },
    "status": [
      {
        "messageType": "INFO",
        "message": "BrAPI base call found with page=0, pageSize=10"
      },
      {
        "messageType": "INFO",
        "message": "Loading CXGN::BrAPI::v2::ObservationUnits"
      },
      {
        "messageType": "INFO",
        "message": "Observation Units search result constructed"
      }
    ],
    "datafiles": []
  }
}

Fixes #5196

Checklist

• Refactoring only
• Documentation only
• Fixture update only
• Bug fix
  • The relevant issue has been closed.
  • Further work is required.
• New feature
  • Relevant tests have been created and run.
  • Data was added to the fixture
    • Data was added via a patch in /t/data/fixture/patches/.
  • User-Facing Change
    • The user manual in /docs has been updated.
  • Any new Perl has been documented using perldoc.
  • Any new JavaScript has been documented using JSDoc.
  • Any new legacy JavaScript has been moved from /js to /js/source/legacy.

[lukasmueller]

:-)