[ci] Add specific packages to run when calling cargo test

Summary:
Moving Cargo.lock to the root means that every time cargo test is ran by the CI, it will test every single test file within
the workspace. By adding the -p flag to the CI instructions, it ensures only specified tests are ran when the CI calls cargo test.

Test Plan: UNIX: python3 contrib/teamcity/build-configurations.py build-explorer; python3 contrib/teamcity/build-configurations.py build-bitcoinsuite-chronik-client

Reviewers: O1 Bitcoin ABC, #bitcoin_abc, Fabien

Reviewed By: O1 Bitcoin ABC, #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D17598