Add guide on how to build ROS 2 with tracing instrumentation

[christophebedard]

Closes #2805

This guide will become invalid/unneeded if we do https://github.com/ros2/ros2/issues/1177

Signed-off-by: Christophe Bedard [email protected]

[christophebedard]

The guide feels too straightforward to me, but maybe I'm jumping over things that are not obvious to other people. Feedback would be really useful.

Also, should this go under Tutorials > Advanced instead?

[christophebedard]

@christophebedard Should we backport this to all of Foxy, Galactic, and Humble?

yep!