Feature: Allow Disabling Streaming for AWS Bedrock

[panyuenlau]

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Problem Statement

The streaming configuration is currently hard-coded to True: https://github.com/cnoe-io/cnoe-agent-utils/blob/main/cnoe_agent_utils/llm_factory.py#L255, which might create issues for users that don't have streaming supported in their infrastructure.

Possible Solution

Similar to other the Azure and OpenAI providers, we shall allow users to control this streaming option via a flag: https://github.com/cnoe-io/cnoe-agent-utils/blob/main/cnoe_agent_utils/llm_factory.py#L342-L343

Alternatives Considered

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