[services] Tests - Fix scripts

Summary:
Depends on D4250

I changed my approach a bit when it comes to testing the services.

I divided the tests into two groups:

• unit tests
• integration tests

Now, if you want to run the tests for one service/all services, you'll do something like this:

yarn run-unit-tests backup
yarn run-integration-tests backup
yarn run-unit-tests blob
yarn run-integration-tests blob
yarn run-unit-tests all
yarn run-integration-tests all

Test Plan:

cd services
yarn run-unit-tests
yarn run-integration-tests

Reviewers: palys-swm, varun, geekbrother, jonringer-comm, yayabosh

Reviewed By: palys-swm, yayabosh

Subscribers: jonringer-comm, jimpo, ashoat, palys-swm, Adrian, atul, yayabosh

Differential Revision: https://phab.comm.dev/D4216