Remove "reinstall" packaging tests (#37851)

The packaging tests currently have a test which installs elasticsearch,
removes it, modifies ownership of /etc/elasticsearch, and
reinstalls. It then checks that the /etc/elasticsearch directory has
ownership that the package expects. But the recursive change touches
files not owned by the package. In the past this worked because we did a
recursive ownership change within the package postinst. However, that
was recently removed, and thus this test no longer makes sense.

qa/vagrant/src/test/resources/packaging/utils/utils.bash

@@ -228,17 +228,6 @@ assert_output() {
     echo "$output" | grep -E "$1"
 }
 
-assert_recursive_ownership() {
-    local directory=$1
-    local user=$2
-    local group=$3
-
-    realuser=$(find $directory -printf "%u\n" | sort | uniq)
-    [ "$realuser" = "$user" ]
-    realgroup=$(find $directory -printf "%g\n" | sort | uniq)
-    [ "$realgroup" = "$group" ]
-}
-
 # Deletes everything before running a test file
 clean_before_test() {