Whitelist SageMakerRuntime InvokeEndpoint operation

[jknollmeyer]

Operation name and request param acquired from this documentation:
https://docs.aws.amazon.com/sdk-for-go/api/service/sagemakerruntime/

Sample subsegment from end-to-end test, works as expected:

{
    "id": "07fe70440891ace9",
    "name": "SageMaker",
    "start_time": 1574375614.193963,
    "end_time": 1574375614.719934,
    "parent_id": "a44a28708794302f",
    "inferred": true,
    "http": {
        "response": {
            "status": 200,
            "content_length": 3
        }
    },
    "aws": {
        "endpoint_name": "test-endpoint-1",
        "operation": "InvokeEndpoint",
        "region": "us-east-1",
        "request_id": "6da963c7-d04e-4ab2-b93e-db012b19fa8e",
        "retries": 0,
        "resource_names": [
            "test-endpoint-1"
        ]
    },
    "trace_id": "1-5dd710be-f3ee90a256c11ab35e722768",
    "origin": "AWS::SageMaker::Endpoint"
}

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[jknollmeyer]

Careful attention to the bindata.go file would be helpful. The file that was generated by make changed a lot more than just the whitelist blob, even though I only changed the whitelisting JSON file.

Is it possible that there were previous changes which affected bindata.go, but the file wasn't regenerated?