feat(core): Coordinate manual workflow activation and deactivation in multi-main scenario (#7643)

Followup to #7566 | Story: https://linear.app/n8n/issue/PAY-926

### Manual workflow activation and deactivation

In a multi-main scenario, if the user manually activates or deactivates
a workflow, the process (whether leader or follower) that handles the
PATCH request and updates its internal state should send a message into
the command channel, so that all other main processes update their
internal state accordingly:

- Add to `ActiveWorkflows` if activating
- Remove from `ActiveWorkflows` if deactivating
- Remove and re-add to `ActiveWorkflows` if the update did not change
activation status.

After updating their internal state, if activating or deactivating, the
recipient main processes should push a message to all connected
frontends so that these can update their stores and so reflect the value
in the UI.

### Workflow activation errors

On failure to activate a workflow, the main instance should record the
error in Redis - main instances should always pull activation errors
from Redis in a multi-main scenario.

### Leadership change

On leadership change...

- The old leader should stop pruning and the new leader should start
pruning.
- The old leader should remove trigger- and poller-based workflows and
the new leader should add them.

packages/cli/test/integration/shared/utils/index.ts

@@ -16,6 +16,7 @@ import { AUTH_COOKIE_NAME } from '@/constants';
 import { LoadNodesAndCredentials } from '@/LoadNodesAndCredentials';
 import { SettingsRepository } from '@db/repositories/settings.repository';
 import { mockNodeTypesData } from '../../../unit/Helpers';
+import { MultiMainSetup } from '@/services/orchestration/main/MultiMainSetup.ee';
 import { mockInstance } from '../../../shared/mocking';
 
 export { setupTestServer } from './testServer';
@@ -28,6 +29,8 @@ export { setupTestServer } from './testServer';
  * Initialize node types.
  */
 export async function initActiveWorkflowRunner() {
+	mockInstance(MultiMainSetup);
+
 	const { ActiveWorkflowRunner } = await import('@/ActiveWorkflowRunner');
 	const workflowRunner = Container.get(ActiveWorkflowRunner);
 	await workflowRunner.init();