enhance: bm25 stats local cache use local storage path (#42923)

Signed-off-by: aoiasd <zhicheng.yue@zilliz.com>

configs/milvus.yaml

@@ -544,7 +544,6 @@ queryNode:
     size: 10 # the size for worker querynode client pool
   idfOracle:
     enableDisk: true
-    localPath: /var/lib/milvus/bm25_logs
     writeConcurrency: 4
   ip:  # TCP/IP address of queryNode. If not specified, use the first unicastable address
   port: 21123 # TCP port of queryNode

internal/querynodev2/delegator/idf_oracle.go

@@ -404,7 +404,7 @@ func (o *idfOracle) syncloop() {
 
 func (o *idfOracle) localloop() {
 	pool := conc.NewPool[struct{}](paramtable.Get().QueryNodeCfg.IDFWriteConcurrenct.GetAsInt())
-	o.dirPath = path.Join(paramtable.Get().QueryNodeCfg.IDFLocalPath.GetValue(), fmt.Sprintf("%d", o.collectionID))
+	o.dirPath = path.Join(paramtable.Get().LocalStorageCfg.Path.GetValue(), "bm25", fmt.Sprintf("%d", o.collectionID))
 
 	defer o.wg.Done()
 	for {

pkg/util/paramtable/component_param.go

@@ -2896,7 +2896,6 @@ type queryNodeConfig struct {
 
 	// Idf Oracle
 	IDFEnableDisk       ParamItem `refreshable:"true"`
-	IDFLocalPath        ParamItem `refreshable:"true"`
 	IDFWriteConcurrenct ParamItem `refreshable:"true"`
 	// partial search
 	PartialResultRequiredDataRatio ParamItem `refreshable:"true"`
@@ -2911,14 +2910,6 @@ func (p *queryNodeConfig) init(base *BaseTable) {
 	}
 	p.IDFEnableDisk.Init(base.mgr)
 
-	p.IDFLocalPath = ParamItem{
-		Key:          "queryNode.idfOracle.localPath",
-		Version:      "2.6.0",
-		Export:       true,
-		DefaultValue: "/var/lib/milvus/bm25_logs",
-	}
-	p.IDFLocalPath.Init(base.mgr)
-
 	p.IDFWriteConcurrenct = ParamItem{
 		Key:          "queryNode.idfOracle.writeConcurrency",
 		Version:      "2.6.0",