[services] Move generateUUID to global tools

Summary:
Depends on D4026

Extracting generateUUID from tunnelbroker into the global tools

Test Plan: Services still build

Reviewers: palys-swm

Reviewed By: palys-swm

Subscribers: ashoat, palys-swm, Adrian, atul, yayabosh

Differential Revision: https://phabricator.ashoat.com/D4027