Overhaul socket stubs on Windows and MacOS (#8106)

Reduce the `socket` allowlists for these platforms to a handful of missing constants

tests/stubtest_allowlists/darwin-py311.txt

@@ -2,3 +2,6 @@ _?curses.A_ITALIC
 _?curses.color_pair
 xxlimited.Xxo.x_exports
 distutils.util.__warningregistry__
+
+# Exists at runtime, missing from stub
+socket.TCP_CONNECTION_INFO

tests/stubtest_allowlists/darwin.txt

@@ -10,12 +10,19 @@ select.KQ_FILTER_NETDEV  # system dependent
 select.kqueue.__init__  # default C signature is wrong
 select.POLLMSG   # system dependent
 
+# Sometimes this exists on darwin, sometimes not
+(_socket.MSG_NOSIGNAL)?
+(socket.MsgFlag.MSG_NOSIGNAL)?
+(socket.MSG_NOSIGNAL)?
+
 # Exists at runtime, but missing from stubs
 distutils.msvccompiler.MSVCCompiler.get_msvc_paths
 distutils.msvccompiler.MSVCCompiler.set_path_env_var
 distutils.msvccompiler.MacroExpander
 mimetypes.MimeTypes.read_windows_registry
 selectors.DefaultSelector.fileno
+socket.PF_SYSTEM
+socket.SYSPROTO_CONTROL
 
 posix.NGROUPS_MAX
 posix.error.characters_written

tests/stubtest_allowlists/linux.txt

@@ -1,3 +1,4 @@
+_socket.*
 _posixsubprocess.cloexec_pipe
 os.EX_NOTFOUND
 os.SF_MNOWAIT
@@ -10,6 +11,7 @@ select.EPOLL_RDHUP
 selectors.KqueueSelector
 signal.SIGEMT
 signal.SIGINFO
+socket.[A-Z0-9_]+
 
 # Exists at runtime, but missing from stubs
 distutils.msvccompiler.MSVCCompiler.get_msvc_paths

tests/stubtest_allowlists/py3_common.txt

@@ -24,7 +24,6 @@ _collections_abc.Set.__rsub__
 _collections_abc.Set.__rxor__
 
 _csv.Dialect.__init__  # C __init__ signature is inaccurate
-_socket.*
 _threading_local.local.__new__
 _weakref.ref.*  # Alias for _weakref.ReferenceType, problems should be fixed there
 _weakref.CallableProxyType.__getattr__  # Should have all attributes of proxy
@@ -237,6 +236,7 @@ xml.etree.cElementTree.Element.__iter__  # Doesn't exist at runtime, but instanc
 # Exists at runtime, but missing from stubs
 # ==========
 _json.encode_basestring
+_socket.CAPI
 _thread.LockType.acquire_lock
 _thread.LockType.locked_lock
 _thread.LockType.release_lock
@@ -290,6 +290,7 @@ multiprocessing.managers.SyncManager.Pool
 multiprocessing.pool.Pool.Process
 multiprocessing.pool.ThreadPool.Process
 multiprocessing.synchronize.Semaphore.get_value
+socket.CAPI
 tkinter.Misc.config
 tkinter.font.Font.counter
 tkinter.simpledialog.Dialog.apply
@@ -404,6 +405,7 @@ multiprocessing.managers.DictProxy.values
 # GetSetDescriptor that always raises AttributeError
 builtins.OSError.characters_written
 # Aliases for OSError
+_socket.error.characters_written
 builtins.EnvironmentError.characters_written
 builtins.IOError.characters_written
 dbm.dumb.error.characters_written
@@ -522,7 +524,6 @@ os.O_[A-Z_]+
 (posix.O_[A-Z_]+)?
 (posix.ST_[A-Z]+)?
 socket.AF_DECnet
-socket.[A-Z0-9_]+
 (termios.[A-Z0-9_]+)?
 
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