Chore: Run Free Disk Space step only for tests that need it

[koralowiec]

After introducing disk cleanup in #69, it runs for each test job. As pointed out by @klezm in #69 (comment), it's only needed for a couple of test scenarios, so it could be limited with a conditional for them (run Free Disk Space step only when the tests for a specific feature require it)

[klezm]

The only package needing more space as I see it is homebrew-package for now