Add rmw_count_clients,services & test

[leeminju531]

this PR is for service counts using it's name like topic. Related to https://github.com/ros2/ros2cli/pull/771

Signed-off-by: leeminju531 dlalswn531@naver.com

[leeminju531]

related PR for CI

• rmw_cyclonedds (https://github.com/ros2/rmw_cyclonedds/pull/427)
• rmw_fastrtps (https://github.com/ros2/rmw_fastrtps/pull/641)
• rmw_connextdds (https://github.com/ros2/rmw_connextdds/pull/93)
• rmw (https://github.com/ros2/rmw/pull/334)

[methylDragon]

rmw interface changes have been merged

• https://github.com/ros2/rmw/pull/334

Wait on

• https://github.com/ros2/rmw_implementation/pull/208

[leeminju531]

@clalancette could you check https://github.com/ros2/rmw_implementation/pull/208#discussion_r1327984686 when you have a chance.

[clalancette]

This looks good now, thanks for the patience @leeminju531 . I went ahead and rebased all of the PRs here onto the latest, and now I'm going to run CI with the following PRs only:

• https://github.com/ros2/rmw_implementation/pull/208
• https://github.com/ros2/rmw_cyclonedds/pull/427
• https://github.com/ros2/rmw_fastrtps/pull/641
• https://github.com/ros2/rmw_connextdds/pull/93

[clalancette]

CI:

• Linux
• Linux-aarch64
• Windows