Fix probable ut fail caused by session key confict (#21883)

Signed-off-by: Nwayblink <anyang.wang@zilliz.com>

internal/distributed/connection_manager_test.go

@@ -18,6 +18,7 @@ package distributed
 
 import (
 	"context"
+	"fmt"
 	"net"
 	"os"
 	"os/signal"
@@ -62,6 +63,9 @@ func TestMain(t *testing.M) {
 func TestConnectionManager(t *testing.T) {
 	ctx := context.Background()
 
+	testPath := fmt.Sprintf("TestConnectionManager-%d", time.Now().Unix())
+	paramtable.Get().Save(paramtable.Get().EtcdCfg.RootPath.Key, testPath)
+
 	session := initSession(ctx)
 	cm := NewConnectionManager(session)
 	cm.AddDependency(typeutil.RootCoordRole)