[SIGMON-553] migrate from ReST type annotations to typehints

Context

• To make sure that sigmon's libraries work both on SWAN and locally by pip installing, we want to have 2 testing jobs in the CI.

What was done

• Add a CI step installing lhcsmapi using pip install .

TODO

• ?

QA

• code was was not unit tested
• acceptance tests were written

Review objectives

• assessment of code functionality