DEV: Fix methods removed in Ruby 3.2 (#15459)

* File.exists? is deprecated and removed in Ruby 3.2 in favor of
File.exist?
* Dir.exists? is deprecated and removed in Ruby 3.2 in favor of
Dir.exist?

script/import_scripts/drupal_json.rb

@@ -23,7 +23,7 @@ class ImportScripts::DrupalJson < ImportScripts::Base
 
   def load_json(arg)
     filename = File.join(JSON_FILES_DIR, arg)
-    raise RuntimeError.new("File #{filename} not found!") if !File.exists?(filename)
+    raise RuntimeError.new("File #{filename} not found!") if !File.exist?(filename)
     JSON.parse(File.read(filename)).reverse
   end