Merge pull request #18375 from yuwata/cli-tools-also-read-kernel-command-line

tree-wide: make CLI tools also read kernel command line when run as service

diff --cc src/core/manager.c
Simple merge

diff --cc src/machine/machined.c
Simple merge

diff --cc src/oom/oomd.c
Simple merge

diff --cc src/portable/portablectl.c
Simple merge

diff --cc src/sysext/sysext.c
Simple merge