Migrate Delete Detector results to SDK using SDKRestClient

[dbwiddis]

Is your feature request related to a problem?

Part of opensearch-project/OpenSearch#5224

What solution would you like?

Migrate the Delete Detector results Rest API to Extensions SDK using SDKRestClient.

Use the implementation of #353 as a reference. Add new issues for any steps you skip.

Implement the following API endpoints:

• DELETE _plugins/_anomaly_detection/detectors/results

[owaiskazi19]

Delete Detector Results requires the index pattern ALL_AD_RESULTS_INDEX_PATTERN which will be created as a part of Start Detector: #383

Tasks:

• Create a basic template for Delete Detector Results
• Migrate the arguments to match up with SDK
• Use Java Client to parse JSON query to request -> Used high level rest client to achieve this
• Test the workflow

[owaiskazi19]

API: DELETE localhost:9200/_extensions/_ad-extension/detectors/results

{
  "query": {
    "bool": {
      "filter": [
        {
          "term": {
            "detector_id": {
              "value": "XqAwu4cBQBVk3lUtpDvr"
            }
          }
        }
      ]
    }
  }
}

Response:

{
    "took": 304,
    "timed_out": false,
    "total": 20,
    "updated": 0,
    "created": 0,
    "deleted": 20,
    "batches": 1,
    "version_conflicts": 0,
    "noops": 0,
    "retries": {
        "bulk": 0,
        "search": 0
    },
    "throttled_millis": 0,
    "requests_per_second": -1.0,
    "throttled_until_millis": 0,
    "failures": []
}