Disable ThreadTests.test_gettrace_all_threads (py3.12) when coverage is running.

The coverage tracer breaks the test, which has a hard-coded list of functions it expects to find.

src/gevent/testing/patched_tests_setup.py

@@ -30,6 +30,7 @@ from .sysinfo import PY38
 from .sysinfo import PY39
 from .sysinfo import PY310
 from .sysinfo import PY311
+from .sysinfo import PY312
 
 from .sysinfo import WIN
 from .sysinfo import OSX
@@ -1212,6 +1213,14 @@ if PY311:
         'test_subprocess.ProcessTestCase.test__use_vfork',
     ]
 
+if PY312:
+    if RUN_COVERAGE:
+        disabled_tests += [
+            # This test wants to look for installed tracing functions, and
+            # having a coverage tracer function installed breaks it.
+            'test_threading.ThreadTests.test_gettrace_all_threads',
+        ]
+
 if TRAVIS:
     disabled_tests += [
         # These tests frequently break when we try to use newer Travis CI images,

src/gevent/testing/sysinfo.py

@@ -68,6 +68,7 @@ PY38 = None
 PY39 = None
 PY310 = None
 PY311 = None
+PY312 = None
 
 NON_APPLICABLE_SUFFIXES = ()
 if sys.version_info[0] == 3:
@@ -89,6 +90,8 @@ if sys.version_info[0] == 3:
         PY310 = True
     if sys.version_info[1] >= 11:
         PY311 = True
+    if sys.version_info[1] >= 12:
+        PY312 = True
 
 elif sys.version_info[0] == 2:
     # Any python 2