[Bug]: [Security]store Kafka crendential in config map

[Ice-YcY]

Is there an existing issue for this?

• I have searched the existing issues

Environment

- Milvus version:2.4.9
- Deployment mode(standalone or cluster):cluster
- MQ type(rocksmq, pulsar or kafka):kafka
- SDK version(e.g. pymilvus v2.0.0rc2):2.4.0
- OS(Ubuntu or CentOS): Ubuntu 
- CPU/Memory: 
- GPU: 
- Others:

Current Behavior

store Kafka crendential in config map

Expected Behavior

store Kafka crendential in secret

Steps To Reproduce

No response

Milvus Log

No response

Anything else?

No response

[yanliang567]

/assign @xiaofan-luan
please help to take a look

[xiaofan-luan]

@Ice-YcY do you want to take this?