lpdumpd: Add snapshotctl dump output.

This will ensure that anytime the output of "lpdump" is captured (eg for
a bugreport), that "snapshotctl dump" is captured as well.

Bug: 291083311
Test: lpdump
Change-Id: Iab7d010a2c336a3fa0df589f183a11ad53b1be02
2 files changed