Regression script in corev-dv/corev_fp_zfinx_instr_test_for_regr?

As of hash 25c4199 (on branch cv32e40p/dev) there is a regression script in cv32e40p/tests/programs/corev-dv/corev_fp_zfinx_instr_test_for_regr/regr.sh. I know that I reviewed and approved the pull-request that added this file, but now I have some concerns. Adding a script to run test-programs in the test-program directory is a significant change to the way tests are compiled and run today, so I have a few questions:

Is the use if this script documented anywhere (such as a README)?
Why was this changed introduced?
Do we need a new script to run the corev_fp_zfinx_instr_test_for_regr test-program, or can we update an existing script to support it?
Can we put the run script in the bin with the others?