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>

public/app/core/utils/fetch.ts

@@ -88,7 +88,7 @@ export const parseBody = (options: BackendSrvRequest, isAppJson: boolean) => {
   return isAppJson ? JSON.stringify(options.data) : new URLSearchParams(options.data);
 };
 
-function serializeParams(data: Record<string, any>): string {
+export function serializeParams(data: Record<string, any>): string {
   return Object.keys(data)
     .map(key => {
       const value = data[key];