Replace deprecated use of apt-key

[bittner]

As of today, some keys for Debian package repositories are installed using apt-key, which is deprecated according to a few emitted warnings, e.g.

W: https://apt.releases.hashicorp.com/dists/jammy/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: https://download.docker.com/linux/ubuntu/dists/jammy/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: https://packages.element.io/debian/dists/default/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.

Related

• Vagrant (sysadmin > virtualization)
• Docker (developer > containerization)
• Element (developer > containerization)