R1:07028cfc30cf

When `bin/drydock lease` is interrupted, release leases

Summary:
Depends on D19072. Ref T13073. Currently, you can leave leases stranded by using `^C` to interrupt the script. Handle signals and release leases on destruction if they haven't activated yet.

Also, print out more useful information before and after activation.

Test Plan: Mashed ^C while runnning `bin/drydock lease ... --trace`, saw the lease release.

Subscribers: yelirekim, PHID-OPKG-gm6ozazyms6q6i22gyam

Maniphest Tasks: T13073…