Provisioning: Allows specifying uid for datasource and use that in derived fields (#23585)

* Add uid to datasource

* Fix uid passing when provisioning

* Better error handling and Uid column type change

* Fix test and strict null error counts

* Add backend tests

* Add tests

* Fix strict null checks

* Update test

* Improve tests

* Update pkg/services/sqlstore/datasource.go

Co-Authored-By: Arve Knudsen <arve.knudsen@gmail.com>

* Variable rename

Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>

packages/grafana-data/src/types/dataLink.ts

@@ -29,7 +29,9 @@ export interface DataLink {
   onClick?: (event: DataLinkClickEvent) => void;
 
   // At the moment this is used for derived fields for metadata about internal linking.
-  meta?: any;
+  meta?: {
+    datasourceUid?: string;
+  };
 }
 
 export type LinkTarget = '_blank' | '_self';

packages/grafana-data/src/types/datasource.ts

@@ -505,6 +505,7 @@ export interface DataSourceSettings<T extends DataSourceJsonData = DataSourceJso
  */
 export interface DataSourceInstanceSettings<T extends DataSourceJsonData = DataSourceJsonData> {
   id: number;
+  uid: string;
   type: string;
   name: string;
   meta: DataSourcePluginMeta;

packages/grafana-ui/src/components/FormField/FormField.tsx

@@ -7,7 +7,8 @@ export interface Props extends InputHTMLAttributes<HTMLInputElement> {
   label: string;
   tooltip?: PopoverContent;
   labelWidth?: number;
-  inputWidth?: number;
+  // If null no width will be specified not even default one
+  inputWidth?: number | null;
   inputEl?: React.ReactNode;
 }