Bug: properly hook gix's interrupt handler

[ds-cbo]

Describe the bug

cargo deny check repeatedly seemed to hang "indefinitely" because I kept Ctrl-C'ing the process before it could hit the 10-minute mark. I had tried enabling the TRACE log messages, but it didn't give any clear reason why it seemed to be hanging. While I was cloning the repo and adding several more trace messages to figure out where and why it could be hanging, a background process finally hit the 10-minute mark and gave the exact error message I was looking for (ie: that a lockfile from a crashed instance was still lingering).

• Add gix lock timeout debug message #551

I think the proper fix is to actually properly hook gix's interrupt handler so interrupts cause the lockfile to be deleted before the process exits/is aborted.

• @Jake-Shadle

To reproduce

1. cargo-deny check & pkill cargo-deny to create the lockfile (yes, that single & is on purpose, because we want to put cargo-deny to the background to kill it, it's not a typo for &&)
2. confirm the lockfile exists at $HOME/.cargo/advisory-dbs/github.cargo-deny.lock
3. cargo-deny check will hang now

cargo-deny version

cargo-deny 0.14.1

What OS were you running cargo-deny on?

MacOS

Additional context

Keywords for searchability: hangs, hanging, freeze, frozen, no output, stuck, doesn't exit