packaging: use libssl3 for Debian/Bullseye (12) packages

[patrick-stephens]

Resolves #7644 by ensuring we use OpenSSL 3 libraries where a distro provides it.

All other distros either do not provide it in default repos or are already using it as far as I can tell.

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Testing
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• Example configuration file for the change
• Debug log output from testing the change

• Attached Valgrind output that shows no leaks or memory corruption was found

If this is a change to packaging of containers or native binaries then please confirm it works for all targets.

• Run local packaging test showing all targets (including any new ones) build.
• Set ok-package-test label to test for all targets (requires maintainer to do).

Documentation

• Documentation required for this feature

#9899

Backporting

• Backport to latest stable release.

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