Ubuntu packaging - PR-11096 (branch beta), by @ermshiperete, testbuild: true #2613

Job	Run time
Build source package	2m 17s
Build binary packages (focal, amd64)	2m 22s
Build binary packages (jammy, amd64)	2m 52s
Build binary packages (mantic, amd64)	3m 42s
Build binary packages (noble, amd64)	3m 50s
Run autopkgtests	1s
Verify API for libkeymancore.so	1m 3s
Sign source and binary packages	0s
Upload packages to llso	0s
Set result status on PR builds	3s
	16m 10s

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