Transformations: Move transformation addition into drawer (#78299)

* Start splitting out code

* Use flag

* A bit of rocket surgery

* Prettify

* Cleanup behavior

* Work through behaviors

* Move empty message from other PR

* Import fixes and prettier

* Clean things up

* Add selector for tests

* Cleanups

* Working with transformation redesign

* Some more tweaks to make sure of correct behavior

* Update betterer/eslint exceptions

* Localization

* Remove unecessary fragments

* Spacing and prettier

* Update tests for new UI

* Update e2e tests

* One more e2e test fix

* Update selectors

* Fix one test and break another

public/locales/fr-FR/grafana.json

@@ -1290,6 +1290,12 @@
       "select-search-input": "Tapez pour rechercher (pays, ville, abréviation)"
     }
   },
+  "transformations": {
+    "empty": {
+      "add-transformation-body": "",
+      "add-transformation-header": ""
+    }
+  },
   "user-orgs": {
     "current-org-button": "Actuel",
     "name-column": "Nom",