main/dbus: add option to move machine-id

When /etc is read-only dbus-uuidgen can't generate a machine-id there. To work around that a symlink to /run/machine-id is possible. dbus-uuidgen will not accept the symlink and try to overwrite it.

With this change dbus-uuidgen can be told to generate the file at /run/machine-id to get the symlink working properly.

assigned to @ncopa

added 34 commits

• 0a432b0d...53a9e10e - 33 commits from branch alpine:master
• aeb79a57 - main/dbus: add option to move machine-id

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merged