`test_depend` resolution when testing is disabled

[Doomerdinger]

System Info

• Operating System: Ubuntu 20.04
• Python Version: 3.8.10
• Version of catkin_tools: 0.9.2
• ROS Distro: noetic

Build / Run Issue

• [ ] Works with catkin_make Unknown
• [ ] Works with catkin_make_isolated --merge
• [ ] Works with catkin build
• [ ] Works with catkin build -p1
• [ ] I did not read this

Expected Behavior

If I build a package which specifies another package as a test_depend in its package.xml but CATKIN_ENABLE_TESTING=0 is specified in the build, the test_depend is disregarded and not built as a pre-requisite.

Actual Behavior

test_depend dependencies are built regardless of if testing is enabled or not.

Steps to Reproduce the Issue

The following is a simple example project. If you change the cmake args to disable testing and then build package B, catkin tools will still build package A first. test_depend.zip