Tempo: TraceQL query response streaming (#69212)

* Refactor Tempo datasource backend to support multiple queryData types.
Added traceId query type that is set when performing the request but doesn't map to a tab.

* WIP data is reaching the frontend

* WIP

* Use channels and goroutines

* Some fixes

* Simplify backend code.
Return traces, metrics, state and error in a dataframe.
Shared state type between FE and BE.
Use getStream() instead of getQueryData()

* Handle errors in frontend

* Update Tempo and use same URL for RPC and HTTP

* Cleanup backend code

* Merge main

* Create grpc client only with host and authenticate

* Create grpc client only with host and authenticate

* Cleanup

* Add streaming to TraceQL Search tab

* Fix merge conflicts

* Added tests for processStream

* make gen-cue

* make gen-cue

* goimports

* lint

* Cleanup go.mod

* Comments

* Addressing PR comments

* Fix streaming for tracel search tab

* Added streaming kill switch as the disableTraceQLStreaming feature toggle

* Small comment

* Fix conflicts

* Correctly capture and send all errors as a DF to client

* Fix infinite error loop

* Fix merge conflicts

* Fix test

* Update deprecated import

* Fix feature toggles gen

* Fix merge conflicts

docs/sources/setup-grafana/configure-grafana/feature-toggles/index.md

@@ -127,6 +127,7 @@ Experimental features might be changed or removed without prior notice.
 | `awsDatasourcesTempCredentials`             | Support temporary security credentials in AWS plugins for Grafana Cloud customers                            |
 | `transformationsRedesign`                   | Enables the transformations redesign                                                                         |
 | `mlExpressions`                             | Enable support for Machine Learning in server-side expressions                                               |
+| `disableTraceQLStreaming`                   | Disables the option to stream the response of TraceQL queries of the Tempo data source                       |
 
 ## Development feature toggles