3.3.0: `test_untracked_memory_doesnt_increase_unfinished_thread_dealloc_in_thread` fails without `uss`

[mtelka]

There is still minor issue after the fix for #379:

test_untracked_memory_doesnt_increase_unfinished_thread_dealloc_in_thread (greenlet.tests.test_leaks.TestLeaks.test_untracked_memory_doesnt_increase_unfinished_thread_dealloc_in_thread) ... Exception in thread Thread-249:
Traceback (most recent call last):
  File "/data/builds/ul-mass-rebuild/components/python/greenlet/build/prototype/i386/usr/lib/python3.14/vendor-packages/greenlet/tests/__init__.py", line 212, in get_process_uss
    return psutil.Process().memory_full_info().uss
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'pmem' object has no attribute 'uss'. Did you mean: 'rss'?

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/lib/python3.14/threading.py", line 1082, in _bootstrap_inner
    self._context.run(self.run)
    ~~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "/usr/lib/python3.14/threading.py", line 1024, in run
    self._target(*self._args, **self._kwargs)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/builds/ul-mass-rebuild/components/python/greenlet/build/prototype/i386/usr/lib/python3.14/vendor-packages/greenlet/tests/test_leaks.py", line 398, in __call__
    self.uss_before = test.get_process_uss()
                      ~~~~~~~~~~~~~~~~~~~~^^
  File "/data/builds/ul-mass-rebuild/components/python/greenlet/build/prototype/i386/usr/lib/python3.14/vendor-packages/greenlet/tests/__init__.py", line 214, in get_process_uss
    raise unittest.SkipTest("uss not supported") from e
unittest.case.SkipTest: uss not supported
FAIL

Please note that test_untracked_memory_doesnt_increase_unfinished_thread_dealloc_in_main is properly skipped:

test_untracked_memory_doesnt_increase_unfinished_thread_dealloc_in_main (greenlet.tests.test_leaks.TestLeaks.test_untracked_memory_doesnt_increase_unfinished_thread_dealloc_in_main) ... Exception in thread Thread-248:
Traceback (most recent call last):
  File "/data/builds/ul-mass-rebuild/components/python/greenlet/build/prototype/i386/usr/lib/python3.14/vendor-packages/greenlet/tests/__init__.py", line 212, in get_process_uss
    return psutil.Process().memory_full_info().uss
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'pmem' object has no attribute 'uss'. Did you mean: 'rss'?

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/lib/python3.14/threading.py", line 1082, in _bootstrap_inner
    self._context.run(self.run)
    ~~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "/usr/lib/python3.14/threading.py", line 1024, in run
    self._target(*self._args, **self._kwargs)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/builds/ul-mass-rebuild/components/python/greenlet/build/prototype/i386/usr/lib/python3.14/vendor-packages/greenlet/tests/test_leaks.py", line 398, in __call__
    self.uss_before = test.get_process_uss()
                      ~~~~~~~~~~~~~~~~~~~~^^
  File "/data/builds/ul-mass-rebuild/components/python/greenlet/build/prototype/i386/usr/lib/python3.14/vendor-packages/greenlet/tests/__init__.py", line 214, in get_process_uss
    raise unittest.SkipTest("uss not supported") from e
unittest.case.SkipTest: uss not supported
skipped 'uss not supported'