[3.14] gh-159739: Avoid destroying a remote unwinder cache twice (GH-159982) (#160084)

Leave cleanup of the code-object cache to the unwinder deallocator if
allocating the thread-local bytecode cache fails.

(cherry picked from commit b577a54)

Author: jelle-openai

Misc/NEWS.d/next/Library/2026-10-20-00-00-00.gh-issue-159739.5d4269.rst

@@ -0,0 +1 @@
+Fix a double free if remote unwinder initialization runs out of memory.

Modules/_remote_debugging_module.c

@@ -3277,7 +3277,6 @@ _remote_debugging_RemoteUnwinder___init___impl(RemoteUnwinderObject *self,
         NULL
     );
     if (self->tlbc_cache == NULL) {
-        _Py_hashtable_destroy(self->code_object_cache);
         PyErr_NoMemory();
         set_exception_cause(self, PyExc_MemoryError, "Failed to create TLBC cache");
         return -1;