fix: don't try to do an interaction_check if there isn't a user available to check

[Revnoplex]

Summary

Fixes #1877
By default, user=None in Paginator and Paginator.edit(). With author_check=True being the default in Paginator, this ultimately causes the interaction_check of Paginator to fail as it doesn't have a user to compare which ultimately means Paginator.edit() is broken by default. Disabling the author check if there is no user to compare allows Paginator.edit() to work by default.

Information

• This PR fixes an issue.
• This PR adds something new (e.g. new method or parameters).
• This PR is a breaking change (e.g. methods or parameters removed/renamed).
• This PR is not a code change (e.g. documentation, README, typehinting,
  examples, ...).

Checklist

• I have searched the open pull requests for duplicates.
• If code changes were made then they have been tested.
  • I have updated the documentation to reflect the changes.
• If type: ignore comments were used, a comment is also left explaining why.
• I have updated the changelog to include these changes.

[Revnoplex]

Actually, what about just doing

self.user = user or self.user
if not self.user:
    self.usercheck = False