Migrate away from apt::key

[sts]

puppet-rspamd version: <= 2.1.0

Repository gpg keys are currently installed via apt::source, which uses apt-key(8) under the hood. apt-key is deprecated in Debian >= 11 versions and prints a warning when apt is called:

W: http://rspamd.com/apt-stable/dists/bookworm/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.

Please switch to using apt::keyring or adding the key to /etc/apt/trusted.gpg.d. puppetlabs/puppetlabs-apt#1128 implements keyrings, which can be used through apt::source, by supplying a name parameter.

[Lightning-]

fixed in 4ce36cb
release will follow soon