test_unload_tests fails in Python 3.11 when executed from an installed directory

[pablogsal]

Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/Users/pgalindo3/github/python/3.11/inss/lib/python3.11/test/__main__.py", line 2, in <module>
    main(_add_python_opts=True)
  File "/Users/pgalindo3/github/python/3.11/inss/lib/python3.11/test/libregrtest/main.py", line 672, in main
    Regrtest(ns, _add_python_opts=_add_python_opts).main(tests=tests)
  File "/Users/pgalindo3/github/python/3.11/inss/lib/python3.11/test/libregrtest/main.py", line 654, in main
    selected, tests = self.find_tests(tests)
                      ^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/pgalindo3/github/python/3.11/inss/lib/python3.11/test/libregrtest/main.py", line 191, in find_tests
    alltests = findtests(testdir=self.test_dir,
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/pgalindo3/github/python/3.11/inss/lib/python3.11/test/libregrtest/findtests.py", line 41, in findtests
    for name in os.listdir(testdir):
                ^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: '/Users/pgalindo3/github/python/3.11/inss/lib/python3.11/test/regrtestdata/import_from_tests'

---

Seems that this is due to #108952 not updating the makefile so regrtestdata is not copied during installation.

Steps to reproduce:

 ./configure -C --prefix=$PWD/inss
make install -j
./inss/bin/python3.11 -m test test_regrtest -v

[pablogsal]

CC: @serhiy-storchaka

[pablogsal]

Looks like commit f8c0198e3bf is missing from 3.11.7

[pablogsal]

Oh, I can see that this was patched in #112784