Elasticsearch: Decoupling from core (#115900)

* Complete decoupling of backend

- Replace usage of featuremgmt
- Copy simplejson
- Add standalone logic

* Complete frontend decoupling

- Fix imports
- Copy store and reducer logic

* Add required files for full decoupling

* Regen cue

* Prettier

* Remove unneeded script

* Jest fix

* Add jest config

* Lint

* Lit

* Prune suppresions

jest.config.js

@@ -82,6 +82,7 @@ module.exports = {
     // Decoupled plugins run their own tests so ignoring them here.
     '<rootDir>/public/app/plugins/datasource/azuremonitor',
     '<rootDir>/public/app/plugins/datasource/cloud-monitoring',
+    '<rootDir>/public/app/plugins/datasource/elasticsearch',
     '<rootDir>/public/app/plugins/datasource/grafana-postgresql-datasource',
     '<rootDir>/public/app/plugins/datasource/grafana-pyroscope-datasource',
     '<rootDir>/public/app/plugins/datasource/grafana-testdata-datasource',