add tutorial for Bedrock Guardrails

[jngz-es]

Description

[Describe what this change achieves]

Issues Resolved

[List any issues this PR will resolve]

Check List

• [ ] New functionality includes testing.
  • [ ] All tests pass
• [ ] New functionality has been documented.
  • [ ] New functionality has javadoc added
• [ ] Commits are signed per the DCO using --signoff

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[ylwu-amzn]

Suggest also add how to use the guardrail model for input_guardrail output_guardrail, like this test example

POST /_plugins/_ml/models/_register?deploy=true
{
    "name": "Bedrock Claude V2 model with openai guardrails model",
    "function_name": "remote",
    "model_group_id": "ppSmpo8Bi-GZ0tf1i7cD",
    "description": "Bedrock Claude V2 model with openai guardrails model",
    "connector_id": "xnJjDZABNFJeYR3IPvTO",
    "guardrails": {
        "input_guardrail": {
            "model_id": "o3JaDZABNFJeYR3I2fRV",
            "response_accept": "^\\s*\"[Aa]ccept\"\\s*$"
        },
        "output_guardrail": {
            "model_id": "o3JaDZABNFJeYR3I2fRV",
            "response_accept": "^\\s*\"[Aa]ccept\"\\s*$"
        },
        "type": "model"
    }
}

[jngz-es]

@kolchfa-aws , could you help have another review?