[ESLint] update @kbn/eslint/no-restricted-paths rule to allow imports mocks from folder (#65471)

Author: alexwizp

.eslintrc.js

@@ -238,6 +238,7 @@ module.exports = {
                 ],
                 from: [
                   '(src|x-pack)/plugins/**/(public|server)/**/*',
+                  '!(src|x-pack)/plugins/**/(public|server)/mocks/index.{js,ts}',
                   '!(src|x-pack)/plugins/**/(public|server)/(index|mocks).{js,ts,tsx}',
                 ],
                 allowSameFolder: true,