Run practracker_tests.py as part of make check

Running these tests in CI will help avoid future bugs like:

The practracker_tests.py unit test file called a function by its old name.

This change does not block legacy/trac#29746 (moved), but it should be done in 0.4.2.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information