Packages/Debian: baker logs are not purged

The following discussion from !17580 (merged) should be addressed:

• @vch9 started a discussion: (+4 comments)

  As noticed by @vect0r purging the agnostic baker doesn't do much, the /var/log/tezos/agnostic-baker.log is not removed. I don't know if we should do anything about .tezos-client