test: Add test required packages in Packit provision

install-to-filesystem-var-mount test requires packages which should
be built into image for Packit provision (system-reinstall-bootc on
package mode testing farm runner)

Signed-off-by: Xiaofeng Wang <henrywangxf@me.com>

Author: henrywang

hack/packages.txt

@@ -3,3 +3,8 @@ rsync
 cloud-init
 /usr/bin/flock
 /usr/bin/awk
+# Required by install-to-filesystem-var-mount test
+parted
+lvm2
+dosfstools
+e2fsprogs