[deployment][packer] compute-images script fixes
the packer compute-image script needs a few fixes:
apt fails to wait for locks to be released: when running on base-images that have some sort of init scripts that install/remove packages,
apt-get fails with a lock error.
2. There's a section regarding
python3-distutils that should be removed now that #16611 is fixed.
python-arvados-fuse should be replaced with
Merge branch '17435-compute-images-changes'
Arvados-DCO-1.1-Signed-off-by: Javier Bértoli <firstname.lastname@example.org>