Product prefill configuration modal: integrate with backend

[stevenbal]

Remaining points from https://github.com/open-formulieren/open-forms/pull/4610 (issue https://github.com/open-formulieren/open-forms/issues/4608) to ensure the PR doesn't hang for too long

• [x] once https://github.com/open-formulieren/open-forms/pull/4620/files is merged
  • [x] implement save
  • [x] uses objecttypeUuid instead of objecttype (which is used by the registration endpoint and in the ObjectType fields)
• [x] modal objecttype select menuPlacement makes it open top, leaving 5th option under header
• [x] implement copy from button
• [x] default selected objecttype doesnt cause options to be populated because wrong objecttype is loaded?
• [x] check if on error data is still filled in
• [x] failure when fetching objecttypes doesnt go away when switching group
• [x] add storybook for copy button