enhance: [2.4] Set maxPartitionNum default value to 1024 (#33950)

Cherry-pick from master
pr: #33949
See also #30059

---------

Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>

configs/milvus.yaml

@@ -185,7 +185,7 @@ natsmq:
 # Related configuration of rootCoord, used to handle data definition language (DDL) and data control language (DCL) requests
 rootCoord:
   dmlChannelNum: 16 # The number of dml channels created at system startup
-  maxPartitionNum: 4096 # Maximum number of partitions in a collection
+  maxPartitionNum: 1024 # Maximum number of partitions in a collection
   minSegmentSizeToEnableIndex: 1024 # It's a threshold. When the segment size is less than this value, the segment will not be indexed
   enableActiveStandby: false
   maxDatabaseNum: 64 # Maximum number of database

pkg/util/paramtable/component_param.go

@@ -939,7 +939,7 @@ func (p *rootCoordConfig) init(base *BaseTable) {
 	p.MaxPartitionNum = ParamItem{
 		Key:          "rootCoord.maxPartitionNum",
 		Version:      "2.0.0",
-		DefaultValue: "4096",
+		DefaultValue: "1024",
 		Doc:          "Maximum number of partitions in a collection",
 		Export:       true,
 	}

tests/python_client/common/common_type.py

@@ -15,7 +15,7 @@ default_limit = 10
 default_batch_size = 1000
 max_limit = 16384
 max_top_k = 16384
-max_partition_num = 4096
+max_partition_num = 1024
 max_role_num = 10
 default_partition_num = 16   # default num_partitions for partition key feature
 default_segment_row_limit = 1000