refactor(core): Use mixins to delete redundant code between Entity classes (no-changelog) (#6616)

* db entities don't need an ID before they are inserted

* don't define constructors on entity classes, use repository.create instead

* use mixins to reduce duplicate code in db entity classes

packages/cli/test/integration/audit/nodes.risk.test.ts

@@ -9,7 +9,6 @@ import { toReportTitle } from '@/audit/utils';
 import { mockInstance } from '../shared/utils/';
 import { LoadNodesAndCredentials } from '@/LoadNodesAndCredentials';
 import { NodeTypes } from '@/NodeTypes';
-import { WorkflowEntity } from '@db/entities/WorkflowEntity';
 
 const nodesAndCredentials = mockInstance(LoadNodesAndCredentials);
 nodesAndCredentials.getCustomDirectories.mockReturnValue([]);
@@ -33,7 +32,7 @@ test('should report risky official nodes', async () => {
 	}, {});
 
 	const promises = Object.entries(map).map(async ([nodeType, nodeId]) => {
-		const details = new WorkflowEntity({
+		const details = Db.collections.Workflow.create({
 			name: 'My Test Workflow',
 			active: false,
 			connections: {},