Remove job server dependency searchengine (#18908)

* Remove job server dependency searchengine

The job server field was not being used. We remove it
as part of a cleanup of server initialization refactor.

https://community-daily.mattermost.com/boards/workspace/zyoahc9uapdn3xdptac6jb69ic/285b80a3-257d-41f6-8cf4-ed80ca9d92e5/495cdb4d-c13a-4992-8eb9-80cfee2819a4?c=8a171d5e-4398-4bc9-8fbf-8b9b14f37069

```release-note
NONE
```

* Fix missing field

```release-note
NONE
```

store/searchlayer/layer_test.go

@@ -29,7 +29,7 @@ func TestUpdateConfigRace(t *testing.T) {
 	cfg := &model.Config{}
 	cfg.SetDefaults()
 	cfg.ClusterSettings.MaxIdleConns = model.NewInt(1)
-	searchEngine := searchengine.NewBroker(cfg, nil)
+	searchEngine := searchengine.NewBroker(cfg)
 	layer := searchlayer.NewSearchLayer(&testlib.TestStore{Store: store}, searchEngine, cfg)
 	var wg sync.WaitGroup