Reduce go unittest time cost (#8556)

Signed-off-by: Nyhmo <yihua.mo@zilliz.com>

internal/querycoord/task_scheduler_test.go

@@ -151,7 +151,7 @@ func TestWatchQueryChannel_ClearEtcdInfoAfterAssignedNodeDown(t *testing.T) {
 	}
 	queryCoord.scheduler.Enqueue([]task{testTask})
 
-	time.Sleep(time.Second)
+	time.Sleep(100 * time.Millisecond)
 	queryCoord.cluster.stopNode(nodeID)
 	for {
 		newActiveTaskIDKeys, _, err := queryCoord.scheduler.client.LoadWithPrefix(activeTaskPrefix)

internal/querynode/query_service_test.go

@@ -160,7 +160,7 @@ func TestSearch_Search(t *testing.T) {
 	err = sendSearchRequest(node.queryNodeLoopCtx, DIM)
 	assert.NoError(t, err)
 
-	time.Sleep(1 * time.Second)
+	time.Sleep(100 * time.Millisecond)
 
 	err = node.Stop()
 	assert.NoError(t, err)
@@ -206,7 +206,7 @@ func TestSearch_SearchMultiSegments(t *testing.T) {
 	err = sendSearchRequest(node.queryNodeLoopCtx, DIM)
 	assert.NoError(t, err)
 
-	time.Sleep(1 * time.Second)
+	time.Sleep(100 * time.Millisecond)
 
 	err = node.Stop()
 	assert.NoError(t, err)

internal/rootcoord/proxy_manager_test.go

@@ -88,7 +88,7 @@ func TestProxyManager(t *testing.T) {
 
 	_, err = cli.Delete(ctx, k1)
 	assert.Nil(t, err)
-	time.Sleep(time.Second)
+	time.Sleep(100 * time.Millisecond)
 	pm.Stop()
-	time.Sleep(time.Second)
+	time.Sleep(100 * time.Millisecond)
 }