Chore: MEGA - Make Eslint Great Again 💅 (#26094)

* Fix lint error in types.ts

* Bump eslint and its deps to latest

* Add eslintignore and remove not needed eslintrcs

* Change webpack configs eslint config

* Update package.jsons and removed unused eslintrc files

* Chore yarn lint --fix 💅

* Add devenv to eslintignore

* Remove eslint disable comments for rules that are not used

* Remaining eslint fixes 💅

* Bump grafana/eslint-config 💥

* Modify package.json

No need for duplicate checks.

* Modify eslintignore to ignore data and dist folders

* Revert removing .eslintrc to make sure not to use certain packages

* Modify package.json to remove not needed command

* Use gitignore for ignoring paths

scripts/grunt/default_task.js

@@ -19,8 +19,7 @@ module.exports = function(grunt) {
 
   // prettier-ignore
   grunt.registerTask('eslint', [
-    'newer:exec:eslintPackages',
-    'newer:exec:eslintRoot'
+    'newer:exec:eslint'
   ]);
 
   // prettier-ignore