get_sample_operation does not match OperationStep Model

[JC-wk]

Describe the bug
The get_sample_operation function doesn't match the OperationStep classs because it is missing id and templateStepId and has stepId which is not in the model.

def get_sample_operation(operation_id: str) -> dict:
    return {
        "id": operation_id,
        "resourceId": "933ad738-7265-4b5f-9eae-a1a62928772e",
        "resourcePath": "/workspaces/933ad738-7265-4b5f-9eae-a1a62928772e",
        "resourceVersion": 0,
        "status": "awaiting_deployment",
        "action": "install",
        "message": "",
        "createdWhen": 1642611942.423857,
        "updatedWhen": 1642611942.423857,
        "steps": [
            {
                "stepId": "main",
                "stepTitle": "deployment for main",
                "resourceId": "933ad738-7265-4b5f-9eae-a1a62928772e",
                "resourceTemplateName": "tre-workspace-base",
                "resourceType": "workspace",
                "resourceAction": "install",
                "status": "awaiting_deployment",
                "updatedWhen": 1642611942.423857
            }
        ]
    }

class OperationStep(AzureTREModel):
    """
    Model to define a step in an operation. Each step references either a secondary resource or the primary resource (stepId=main)
    The steps are built up front as the operation is created from the initial user request.
    As each step completes, the next one is processed.
    """
    id: str = Field(title="Id", description="Unique id identifying the step")
    templateStepId: str = Field(title="templateStepId", description="Unique id identifying the step")
    stepTitle: Optional[str] = Field(title="stepTitle", description="Human readable title of what the step is for")
    resourceId: Optional[str] = Field(title="resourceId", description="Id of the resource to update")
.....

Steps to reproduce

1.N/A (code issue)

Azure TRE release version (e.g. v0.14.0 or main):
main
Deployed Azure TRE components - click the (i) in the UI:
latest