Create new rmw_security_common

[ahcorde]

the new rmw_zenoh_cpp has an open PR to include certificates using the --enclave argument. This requires to use rmw_dds_common::get_security_files which is not a dds unique utility.

The idea with new package is to include here all the security common things.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.94%. Comparing base (5968e6b) to head (5300b83).

Additional details and impacted files

@@           Coverage Diff            @@
##           rolling     #330   +/-   ##
========================================
  Coverage    88.94%   88.94%           
========================================
  Files           24       24           
  Lines          615      615           
  Branches        64       64           
========================================
  Hits           547      547           
  Misses          50       50           
  Partials        18       18           

Flag	Coverage Δ
unittests	88.94% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[clalancette]

I know I suggested this, but I am slightly concerned here about the fact that this package is very low-level (e.g. used by RMW implementations), while the rest of the packages here are very high-level (e.g. Python and CMake packages). I discussed this a bit with @mjcarroll , and we thought it might make more sense to actually move this into https://github.com/ros2/rmw . However, as part of that it might actually also make sense to reimplement it as a pure-C header, rather than C++ (so it can be wrapped).

I'm going to put this on the agenda for the ROS 2 weekly meeting next week so we can discuss it a bit more.

[fujitatomoya]

we thought it might make more sense to actually move this into https://github.com/ros2/rmw

i agree with this 👍