gh-132950: Skip test_remote_pdb if remote exec is disabled (#132951)

Lib/test/test_remote_pdb.py

diff --git a/Lib/test/test_remote_pdb.py b/Lib/test/test_remote_pdb.py
index a1bef2d..8d2b584 100644
--- a/Lib/test/test_remote_pdb.py
+++ b/Lib/test/test_remote_pdb.py
@@ -21,6 +21,10 @@
 from pdb import _PdbServer, _PdbClient
 
 
+if not sys.is_remote_debug_enabled():
+    raise unittest.SkipTest('remote debugging is disabled')
+
+
 @contextmanager
 def kill_on_error(proc):
     """Context manager killing the subprocess if a Python exception is raised."""