[Bug]: Partition-level rate limiting is not working

[bigsheeper]

Is there an existing issue for this?

• I have searched the existing issues

Environment

- Milvus version: master&2.4
- Deployment mode(standalone or cluster):
- MQ type(rocksmq, pulsar or kafka):    
- SDK version(e.g. pymilvus v2.0.0rc2):
- OS(Ubuntu or CentOS): 
- CPU/Memory: 
- GPU: 
- Others:

Current Behavior

If the user does not specify a partitionName (which is allowed, such as when inserts default to the "default" partition without specifying partitionName), the partition limiter check is bypassed, resulting in partition-level rate limiting being not working.

Expected Behavior

No response

Steps To Reproduce

No response

Milvus Log

No response

Anything else?

No response

[bigsheeper]

/assign @SimFG
/unassign @yanliang567

[bigsheeper]

/assign