Py3.14 w/JIT: Fix leakchecks.

Py3.14 with the JIT enabled creates new 'uop_executor' objects as code gets jitted.
There's nothing we can do about these (right? They're attached to code objects),
so don't count them as leaking.

Fixes #455 and fixes #460

Author: jamadden

src/greenlet/tests/leakcheck.py

@@ -136,6 +136,18 @@ class _RefCountChecker(object):
     # presumably.
     IGNORED_TYPES = () #(tuple, dict, types.FrameType, types.TracebackType)
 
+    # Names of types that should be ignored. Use this when we cannot
+    # or don't want to import the class directly.
+    IGNORED_TYPE_NAMES = (
+        # This appears in Python3.14 with the JIT enabled. It
+        # doesn't seem to be directly exposed to Python; the only way to get
+        # one is to cause code to get jitted and then look for all objects
+        # and find one with this name. But they multiply as code
+        # executes and gets jitted, in ways we don't want to rely on.
+        # So just ignore it.
+        'uop_executor',
+    )
+
     def __init__(self, testcase, function):
         self.testcase = testcase
         self.function = function
@@ -179,9 +191,14 @@ def _include_object_p(self, obj):
                 return False
 
 
-        if kind in self.ignored_types or kind in self.IGNORED_TYPES:
+        if (
+            kind in self.ignored_types
+            or kind in self.IGNORED_TYPES
+            or kind.__name__ in self.IGNORED_TYPE_NAMES
+        ):
             return False
 
+
         return True
 
     def _growth(self):