Explore: Support mixed data sources for supplementary query (#63036)

* Consolidate logs volume logic (full range and limited)

* Fix showing limited histogram message

* Test passing meta data to logs volume provider

* Improve readability

* Clean up types

* Add basic support for multiple log volumes

* Move the comment back to the right place

* Improve readability

* Clean up the logic to support Logs Samples

* Update docs

* Sort log volumes

* Provide title to logs volume panel

* Move logs volume cache to the provider factory

* Add helper functions

* Reuse only if queries are the same

* Fix alphabetical sorting

* Move caching out of the provider

* Support errors and loading state

* Remove unused code

* Consolidate supplementary query utils

* Add tests for supplementaryQueries

* Update tests

* Simplify logs volume extra info

* Update tests

* Remove comment

* Update tests

* Fix hiding the histogram for hidden queries

* Simplify loading message

* Update tests

* Wait for full fallback histogram to load before showing it

* Fix a typo

* Add feedback comments

* Move feedback comments to github

* Do not filter out hidden queries as they may be used as references in other queries

* Group log volume by refId

* Support showing fallback histograms per query to avoid duplicates

* Improve type-checking

* Fix supplementaryQueries.test.ts

* Fix logsModel.test.ts

* Fix loading fallback results

* Fix unit tests

* WIP

* Update deprecated styles

* Simplify test

* Simplify rendering zoom info

* Update deprecated styles

* Simplify getLogsVolumeDataSourceInfo

* Simplify isLogsVolumeLimited()

* Simplify rendering zoom info

public/test/mocks/datasource_srv.ts

@@ -60,6 +60,12 @@ export class MockDataSourceApi extends DataSourceApi {
   testDatasource() {
     return Promise.resolve();
   }
+
+  setupMixed(value: boolean) {
+    this.meta = this.meta || {};
+    this.meta.mixed = value;
+    return this;
+  }
 }
 
 export class MockObservableDataSourceApi extends DataSourceApi {