Make control plane connector send encrypted password (#4607)

Control plane needs the encrypted hash that postgres itself generates

pgxn/neon/control_plane_connector.c

@@ -32,6 +32,7 @@
 #include "port.h"
 #include <curl/curl.h>
 #include "utils/jsonb.h"
+#include "libpq/crypt.h"
 
 static ProcessUtility_hook_type PreviousProcessUtilityHook = NULL;
 
@@ -161,7 +162,22 @@ ConstructDeltaMessage()
 			PushKeyValue(&state, "name", entry->name);
 			if (entry->password)
 			{
+#if PG_MAJORVERSION_NUM == 14
+				char	   *logdetail;
+#else
+				const char *logdetail;
+#endif
 				PushKeyValue(&state, "password", (char *) entry->password);
+				char	   *encrypted_password = get_role_password(entry->name, &logdetail);
+
+				if (encrypted_password)
+				{
+					PushKeyValue(&state, "encrypted_password", encrypted_password);
+				}
+				else
+				{
+					elog(ERROR, "Failed to get encrypted password: %s", logdetail);
+				}
 			}
 			if (entry->old_name[0] != '\0')
 			{

test_runner/regress/test_ddl_forwarding.py

@@ -33,6 +33,7 @@ def handle_role(dbs, roles, operation):
                     dbs[db] = operation["name"]
         if "password" in operation:
             roles[operation["name"]] = operation["password"]
+            assert "encrypted_password" in operation
     elif operation["op"] == "del":
         if "old_name" in operation:
             roles.pop(operation["old_name"])