QueryGroup & DataSourceSrv & DataSourcePicker changes simplify usage, error handling and reduce duplication, support for uid (#29542)

* Starting moving more stuff into data source picker

* WIP progress

* Progress on datasource picker rethink

* Things are working now some details to figure out

* Removed commented part

* Complex work on getting data source lists

* Fixed variable support showing correct data sources

* Tried fixing dashboard import but failed

* Fixes

* Fixed import dashboard

* Fixed unit test

* Fixed explore test

* Fixed test

* Fix

* fixed more tests

* fixed more tests

* fixed showing which option is default in picker

* Changed query variable to use data source picker, updated tests and e2e

* Fixed more tests

* Updated snapshots, had wrong typescript version

packages/grafana-runtime/src/services/dataSourceSrv.ts

@@ -16,14 +16,9 @@ export interface DataSourceSrv {
   get(name?: string | null, scopedVars?: ScopedVars): Promise<DataSourceApi>;
 
   /**
-   * Get all data sources
+   * Get a list of data sources
    */
-  getAll(): DataSourceInstanceSettings[];
-
-  /**
-   * Get all data sources except for internal ones that usually should not be listed like mixed data source.
-   */
-  getExternal(): DataSourceInstanceSettings[];
+  getList(filters?: GetDataSourceListFilters): DataSourceInstanceSettings[];
 
   /**
    * Get settings and plugin metadata by name or uid
@@ -31,6 +26,17 @@ export interface DataSourceSrv {
   getInstanceSettings(nameOrUid: string | null | undefined): DataSourceInstanceSettings | undefined;
 }
 
+/** @public */
+export interface GetDataSourceListFilters {
+  mixed?: boolean;
+  metrics?: boolean;
+  tracing?: boolean;
+  annotations?: boolean;
+  dashboard?: boolean;
+  variables?: boolean;
+  pluginId?: string;
+}
+
 let singletonInstance: DataSourceSrv;
 
 /**