Remove perl from codebase

[legoktm]

• I have searched for duplicates or related issues

Description

Remove all the perl oneliners from our codebase.

User Stories

• As a developer, our code is primarily written in Python, and when necessary, shell script. We should avoid shelling out to Perl and introducing yet another language in our stack.

user@dev ~/g/f/securedrop-workstation (main)> rg 'perl '
files/provision-all
36:all_sdw_vms_target="$(qvm-ls --tags sd-workstation --raw-list | perl -npE 's/\n/,/g' | perl -npE 's/,$//' )"

dom0/sd-clean-all.sls
119:      - qvm-run sys-firewall 'sudo perl -pi -E "s#^/rw/config/sd-copy-rpm-repo-pubkey.sh##" /rw/config/rc.local'

dom0/sd-usb-autoattach-remove.sls
9:        qvm-run sys-usb 'sudo perl -i -0pe "s/### BEGIN securedrop-workstation ###.*### END securedrop-workstation ###//gms" /rw/config/rc.local'

tests/test_vms_platform.py
41:        cmd = "perl -nE '/^PRETTY_NAME=\"(.*)\"$/ and say $1' /etc/os-release"

tests/test_proxy_vm.py
72:        cmd = "perl -F= -lane 'print $F[0]' /usr/share/applications/mimeapps.list"

tests/test_app.py
25:        cmd = "perl -F= -lane 'print $F[1]' /usr/share/applications/mimeapps.list | sort | uniq -c"
31:        cmd = "perl -F= -lane 'print $F[0]' /usr/share/applications/mimeapps.list"

There is absolutely no need to use perl in tests. The perl snippet in our Makefile is pretty standard so I wouldn't include that in this issue.

[legoktm]

• dom0/sd-clean-all.sls fixed in e337a7b
• files/provision-all fixed in aa59a11
• tests/ fixes proposed in Remove perl from tests #1184

Just leaves:

securedrop_salt/sd-usb-autoattach-remove.sls
8:        qvm-run sys-usb 'sudo perl -i -0pe "s/### BEGIN securedrop-workstation ###.*### END securedrop-workstation ###//gms" /rw/config/rc.local'

which seems like a straightforward sed.