[services] Tunnelbroker - Adding boolean config parameters to be used in the config file

Summary:
This diff introduces changes that add the ability to use boolean config parameters be used in the config ini file. By default, it is used as a CLI parameter in the case of the boolean.
By adding the boolean type and default value we can use boolean parameters in the config ini file by providing them in appropriate sections.

Linear task: ENG-3022

Test Plan:
Adding parameters to the config file:

[sessions]
skip_authentication = true
disable_deviceid_validation = true

resulting in a true on calling isConfigParameterSet

Reviewers: jon, bartek

Reviewed By: bartek

Subscribers: ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D6749