Optionally delete older records (limit number of rows)

I took a stab at this, I'm still learning the correct coding standards and how to make these types of administrative settings. It's expanding on what greggles posted on Issue 2026903 and my own basic knowledge. I hope it at least gives someone a starting point.

The code creates two configuration settings, one integer for Per User and one for Total. Using this information, it then has a cron that removes login history events based on these integer values. It will also check on user login to see if the number of logins is above the per user limit and removes the oldest.

This would be a nice feature to have, hopefully it will be rolled into a release.

I tested it in Drupal 10. Works fine (per user)

I was almost to the point of committing this, but I started to dislike the security implications of some users being able to erase the login history of others. For that reason, the keep_total option must be removed.