Chore: Migrates reducers and actions to Redux Toolkit (#21287)

* Refactor: Adds Redux Toolkit package

* Refactor: Uses configureStore from Redux Toolkit

* Refactor: Migrates applicationReducer

* Refactor: Migrates appNotificationsReducer

* Refactor: Migrates locationReducer

* Refactor: Migrates navModelReducer

* Refactor: Migrates teamsReducer and teamReducer

* Refactor: Migrates cleanUpAction

* Refactor: Migrates alertRulesReducer

* Refactor: Cleans up recursiveCleanState

* Refactor: Switched to Angular compatible reducers

* Refactor: Migrates folderReducer

* Refactor: Migrates dashboardReducer

* Migrates panelEditorReducer

* Refactor: Migrates dataSourcesReducer

* Refactor: Migrates usersReducer

* Refactor: Migrates organizationReducer

* Refactor: Migrates pluginsReducer

* Refactor: Migrates ldapReducer and ldapUserReducer

* Refactor: Migrates apiKeysReducer

* Refactor: Migrates exploreReducer and itemReducer

* Refactor: Removes actionCreatorFactory and reducerFactory

* Refactor: Moves mocks to test section

* Docs: Removes sections about home grown framework

* Update contribute/style-guides/redux.md

Co-Authored-By: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>

* Refactor: Cleans up some code

* Refactor: Adds state typings

* Refactor: Cleans up typings

* Refactor: Adds comment about ImmerJs autoFreeze

Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>

package.json

@@ -204,6 +204,7 @@
     "@babel/polyfill": "7.6.0",
     "@braintree/sanitize-url": "4.0.0",
     "@grafana/slate-react": "0.22.9-grafana",
+    "@reduxjs/toolkit": "1.2.1",
     "@torkelo/react-select": "2.4.1",
     "@types/react-loadable": "5.5.2",
     "angular": "1.6.9",