fix(core): Make node execution order configurable, and backward-compatible (#6507)

* fix(core): Make node execution order configurable, and backward-compatible

* ⚡ Also add new Merge-Node behaviour

* ⚡ Fix typo

* Fix lint issue

* update labels

* rename legacy to v0

* remove the unnecessary log

* default all new workflows to use v1 execution-order

* remove the controller changes

* clone default settings to avoid it getting modified

---------

Co-authored-by: Jan Oberhauser <jan.oberhauser@gmail.com>

packages/workflow/src/Interfaces.ts

@@ -1429,8 +1429,7 @@ export interface INodeTypeDescription extends INodeTypeBaseDescription {
 	eventTriggerDescription?: string;
 	activationMessage?: string;
 	inputs: string[];
-	forceInputNodeExecution?: string | boolean; // TODO: This option should be deprecated after a while
-	requiredInputs?: string | number[] | number;
+	requiredInputs?: string | number[] | number; // Ony available with executionOrder => "v1"
 	inputNames?: string[];
 	outputs: string[];
 	outputNames?: string[];
@@ -1770,6 +1769,7 @@ export interface IWorkflowSettings {
 	saveManualExecutions?: 'DEFAULT' | boolean;
 	saveExecutionProgress?: 'DEFAULT' | boolean;
 	executionTimeout?: number;
+	executionOrder?: 'v0' | 'v1';
 }
 
 export interface WorkflowTestData {