cache provider Milvus doesn't work

[zhujiaxin]

If you are reporting any crash or any potential security issue, do not
open an issue in this repo. Please report the issue via ASRC(Alibaba Security Response Center) where the issue will be triaged appropriately.

• I have searched the issues of this repository and believe that this is not a duplicate.

Ⅰ. Issue Description

when use Milvus 2.6.4 as ai cache plugin provider, search doesn't have score_threshold in go code,so whatever i ask, same ansnwer will show if plugin is enable.

Ⅱ. Describe what happened

If there is an exception, please attach the exception trace:

Just paste your stack trace here!

Ⅲ. Describe what you expected to happen

If this is confirmed to be a bug, can someone fix it? If not, could you provide an example script for creating a collection?

Ⅳ. How to reproduce it (as minimally and precisely as possible)

1. just use higress 2.1.8 and Milvus 2.6.4 can reproduce it .

Ⅴ. Anything else we need to know?

It is recommended to provided Higress runtime logs and configurations for us to investigate your issue, especially for controller and gateway components.

Please checkout following documents on how to obtain these data.

• https://higress.cn/docs/latest/ops/how-tos/view-logs/
• https://higress.cn/docs/latest/ops/how-tos/view-configs/

Ⅵ. Environment:

• Higress version: 2.1.8
• OS:
• Others:

[CH3CHO]

Please provide your full configuration and logs for further investigation.

[CH3CHO]

It works on my PC.

Please make sure the collectionID is configured properly (which should be set to the collection name you create in Milvus).