This diff introduces adding the `sessions.skip_authentication` config flag. It will be used in D6253 to skip the authentication mechanism.
As we don't have a function to get boolean flags from the config file (we have string parameters), the internal `isParameterSet` function was created to get the boolean value of the flag.
Linear task: [[ https://linear.app/comm/issue/ENG-2642/disabling-authentication-mechanism-by-the-config-flag-in-tunnelbroker | ENG-2642 ]]