Change the ownership of the "deps" directory to a not yet created user with the ID 1000. This user gets created when the gerrit verifications use the container for building. Changing the ownership of the deps directory allows using them and updating them as needed (e.g. if the patch in review changes a commit of one of the deps).
Chowning here once results in faster jobs, compared to if we did it every time the gerrit verifications job ran.
Creating the user here would result in conflicts with other containers depending on debian-bookworm-titan that may create their own user with the same UID.
