Add chicken bit to allow test/exec mismatch for all commands

src/command.cpp

@@ -1156,7 +1156,7 @@ CommandCost DoCommandPInternal(TileIndex tile, uint32 p1, uint32 p2, uint64 p3,
 	Backup<CompanyID> cur_company(_current_company, FILE_LINE);
 	if (exec_as_spectator) cur_company.Change(COMPANY_SPECTATOR);
 
-	bool test_and_exec_can_differ = (cmd_flags & CMD_NO_TEST) != 0;
+	bool test_and_exec_can_differ = ((cmd_flags & CMD_NO_TEST) != 0) || HasChickenBit(DCBF_CMD_NO_TEST_ALL);
 
 	GameRandomSeedChecker random_state;
 

src/debug_settings.h

@@ -20,6 +20,7 @@ enum ChickenBitFlags {
 	DCBF_DESYNC_CHECK_POST_COMMAND     = 3,
 	DCBF_DESYNC_CHECK_NO_GENERAL       = 4,
 	DCBF_DESYNC_CHECK_PERIODIC_SIGNALS = 5,
+	DCBF_CMD_NO_TEST_ALL               = 6,
 };
 
 inline bool HasChickenBit(ChickenBitFlags flag)