Copy test folder before running test suite on CI

When we no longer install the test package AND want to run outside the
source tree (to test the installed easybuild package) we need to
retrieve the test package first.

Author: Flamefire

.github/workflows/unit_tests.yml

@@ -240,6 +240,8 @@ jobs:
             # create file owned by root but writable by anyone (used by test_copy_file)
             sudo touch /tmp/file_to_overwrite_for_easybuild_test_copy_file.txt
             sudo chmod o+w /tmp/file_to_overwrite_for_easybuild_test_copy_file.txt
+            # Copy test folder first as that module is NOT installed. Could be run from source tree but we want to test the installed package
+            cp -r $GITHUB_WORKSPACE/test .
             # run test suite
             python -O -m test.framework.suite 2>&1 | tee test_framework_suite.log
             # try and make sure output of running tests is clean (no printed messages/warnings)