Issue #24266: Merge readline Ctrl+C handling from 3.5

Misc/NEWS

@@ -232,6 +232,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #24266: Ctrl+C during Readline history search now cancels the search
+  mode when compiled with Readline 7.
+
 - Issue #26590: Implement a safe finalizer for the _socket.socket type. It now
   releases the GIL to close the socket.
 

Modules/readline.c

@@ -1138,6 +1138,9 @@ readline_until_enter_or_signal(const char *prompt, int *signal)
 #endif
             if (s < 0) {
                 rl_free_line_state();
+#if defined(RL_READLINE_VERSION) && RL_READLINE_VERSION >= 0x0700
+                rl_callback_sigcleanup();
+#endif
                 rl_cleanup_after_signal();
                 rl_callback_handler_remove();
                 *signal = 1;