Add deb test that tests this behaviour only for securedrop-keyring, and add test to make tests target
Test plan
In a debian-based vm, install seuredrop-keyring-0.1.7 from apt-test
Build securedrop-keyring-0.2.0 deb from the tip of this branch, and install it using dpkg
[x] deb installs successfully and no additional files are created in /etc/apt/trusted.gpg.d/
[x] bonus: importing the new keyring to an as-yet-unsed gpg homedir (eg gpg --homedir /tmp --import /etc/apt/trusted.gpg.d/securedrop-keyring.gpg) shows only the 2024 expiry pubkey
Closes #450
make tests
targetTest plan
/etc/apt/trusted.gpg.d/
gpg --homedir /tmp --import /etc/apt/trusted.gpg.d/securedrop-keyring.gpg
) shows only the 2024 expiry pubkey