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/nodes-base/nodes/CompareDatasets/CompareDatasets.node.ts

@@ -24,8 +24,7 @@ export class CompareDatasets implements INodeType {
 		// eslint-disable-next-line n8n-nodes-base/node-class-description-inputs-wrong-regular-node
 		inputs: ['main', 'main'],
 		inputNames: ['Input A', 'Input B'],
-		forceInputNodeExecution: '={{ $version < 2.3 }}',
-		requiredInputs: '={{ $version < 2.3 ? undefined : 1 }}',
+		requiredInputs: 1,
 		// eslint-disable-next-line n8n-nodes-base/node-class-description-outputs-wrong
 		outputs: ['main', 'main', 'main', 'main'],
 		outputNames: ['In A only', 'Same', 'Different', 'In B only'],