Running Address Sanitizers on CI

[chapulina]

There's currently some ongoing work to clean up ASAN warnings on Ignition Math. In order not to introduce regressions in the future, we should set up CI that runs ASAN periodically.

Desired behavior

ASAN is run periodically and its status is tracked by the build farmer.

Alternatives considered

People could keep running it manually...

Implementation suggestion

The current idea is to:

• add a new BUILD_TYPE to ign-cmake based on http://www.stablecoder.ca/2018/02/01/analyzer-build-types.html
• setup GitHub actions to run the sanitizers periodically

Most of the work should go into ign-cmake, and we may create a new GitHub action on https://github.com/ignition-tooling, similar to https://github.com/ignition-tooling/action-ignition-ci, or add a parameter to the existing action that enables ASAN.

Additional context

We considered using colcon's sanitizers like we have explained in our contribution guide, but decided for an ign-cmake native approach so this can be run without colcon.

[j-rivero]

ASAN builds are already running on our buildfarm https://build.osrfoundation.org/view/asan/. I'm waiting for the buildfarmer dashboard to include them https://github.com/osrf/buildfarmer/pull/304 but the task can consider done.

[j-rivero]

Blocked by gazebo-tooling/release-tools#820