[services] Tunnelbroker - Move install corrosion script to lib

Summary:
Depends on D4859

I will be using corrosion in the backup service so I moved the script to install it to the mutual space: lib.

Test Plan: tunnelbroker still builds

Reviewers: tomek, max, jon

Reviewed By: tomek, max, jon

Subscribers: jon, ashoat, tomek, adrian, atul, abosh

Differential Revision: https://phab.comm.dev/D4860