Merge commit '5b291fcbe41564264954618fb1f4086a3be1c600' into glitch-soc/merge-upstream

Conflicts:
- `app/validators/poll_options_validator.rb`:
  Upstream split `PollValidator` in two, and glitch-soc had local changes to
  make the options configurable.
  Refactored as upstream did, keeping glitch-soc's configurable limits.

spec/requests/api/v2/instance_spec.rb

@@ -59,7 +59,7 @@ RSpec.describe 'Instances' do
             description_limit: MediaAttachment::MAX_DESCRIPTION_LENGTH
           ),
           polls: include(
-            max_options: PollValidator::MAX_OPTIONS
+            max_options: PollOptionsValidator::MAX_OPTIONS
           )
         )
       )