PathAlias::preSave() should also trim the path, not just the alias

triggering for 10.1

Tested this on Drupal 10.1 with a standard install
Followed the steps in the issue summary and confirmed I was able to add a URL alias /node/1/
With node/1 having an alias of /hello-world.
I add a menu link to the main navigation for node/1
When I got to any page I see that the alias works fine.
Unless I missed a step

But agree it should cleanup the trialing /
Can the issue summary be updated with the proposed solution.

Thanks.

Added type hinting in the batch process and changed the limit from 25 to 50 in the post_update hook.

I've revised the issue description; please feel free to suggest any further changes if you think they are needed.