Trace UI demo (#20297)

* Add integration with Jeager
Add Jaeger datasource and modify derived fields in loki to allow for opening a trace in Jager in separate split.
Modifies build so that this branch docker images are pushed to docker hub
Add a traceui dir with docker-compose and provision files for demoing.:wq

* Enable docker logger plugin to send logs to loki

* Add placeholder zipkin datasource

* Fixed rebase issues, added enhanceDataFrame to non-legacy code path

* Trace selector for jaeger query field

* Fix logs default mode for Loki

* Fix loading jaeger query field services on split

* Updated grafana image in traceui/compose file

* Fix prettier error

* Hide behind feature flag, clean up unused code.

* Fix tests

* Fix tests

* Cleanup code and review feedback

* Remove traceui directory

* Remove circle build changes

* Fix feature toggles object

* Fix merge issues

* Fix some null errors

* Fix test after strict null changes

* Review feedback fixes

* Fix toggle name

Co-authored-by: David Kaltschmidt <david.kaltschmidt@gmail.com>

pkg/plugins/dashboards_test.go

@@ -18,7 +18,11 @@ func TestPluginDashboards(t *testing.T) {
 		_, err := sec.NewKey("path", "testdata/test-app")
 		So(err, ShouldBeNil)
 
-		pm := &PluginManager{}
+		pm := &PluginManager{
+			Cfg: &setting.Cfg{
+				FeatureToggles: map[string]bool{},
+			},
+		}
 		err = pm.Init()
 		So(err, ShouldBeNil)