Delete connector usage reporting task in on-prem and cloud (#199650)

Towards: elastic/response-ops-team#209

`connector_usage_reporting` task is supposed to work only in serverless.
As there is no check for that, even though it reports nothing, It was
working for on-prem and cloud as well.
This PR deletes the `connector_usage_reporting` task after the first run
by checking if `plugins.cloud.serverless.projectId` is missing.

### To verify:
Run Kibana on this branch, then check the reporting task in the console
by running the below query.
There shouldn't be any task.

```
GET .kibana_task_manager_*/_search
{
  "query": {
    "prefix": {
      "task.taskType": {
        "value": "actions:"
      }
    }
  }
}
```

Then remove or comment out the line (`shouldDeleteTask: true`) added by
this PR and save the file, Kibana will restart and register the task
again. You can use the above query again to see that the task is still
registered.

x-pack/plugins/actions/server/plugin.ts

@@ -140,6 +140,7 @@ export interface PluginSetupContract {
   getActionsHealth: () => { hasPermanentEncryptionKey: boolean };
   getActionsConfigurationUtilities: () => ActionsConfigurationUtilities;
   setEnabledConnectorTypes: (connectorTypes: EnabledConnectorTypes) => void;
+
   isActionTypeEnabled(id: string, options?: { notifyUsage: boolean }): boolean;
 }
 
@@ -168,6 +169,7 @@ export interface PluginStartContract {
     params: Params,
     variables: Record<string, unknown>
   ): Params;
+
   isSystemActionConnector: (connectorId: string) => boolean;
 }
 

x-pack/plugins/actions/server/usage/connector_usage_reporting_task.test.ts

@@ -230,10 +230,11 @@ describe('ConnectorUsageReportingTask', () => {
     const response = await taskRunner.run();
 
     expect(logger.warn).toHaveBeenCalledWith(
-      'Missing required project id while running actions:connector_usage_reporting'
+      'Missing required project id while running actions:connector_usage_reporting, reporting task will be deleted'
     );
 
     expect(response).toEqual({
+      shouldDeleteTask: true,
       state: {
         attempts: 0,
         lastReportedUsageDate,
@@ -391,4 +392,27 @@ describe('ConnectorUsageReportingTask', () => {
       'Usage data could not be pushed to usage-api. Stopped retrying after 5 attempts. Error:test-error'
     );
   });
+
+  it('does not schedule the task when the project id is missing', async () => {
+    const core = createSetup();
+    const taskManagerStart = taskManagerStartMock();
+
+    const task = new ConnectorUsageReportingTask({
+      eventLogIndex: 'test-index',
+      projectId: undefined,
+      logger,
+      core,
+      taskManager: mockTaskManagerSetup,
+      config: {
+        url: 'usage-api',
+        ca: {
+          path: './ca.crt',
+        },
+      },
+    });
+
+    await task.start(taskManagerStart);
+
+    expect(taskManagerStart.ensureScheduled).not.toBeCalled();
+  });
 });

x-pack/plugins/actions/server/usage/connector_usage_reporting_task.ts

@@ -82,6 +82,9 @@ export class ConnectorUsageReportingTask {
   }
 
   public start = async (taskManager?: TaskManagerStartContract) => {
+    if (!this.projectId) {
+      return;
+    }
     if (!taskManager) {
       this.logger.error(
         `Missing required task manager service during start of ${CONNECTOR_USAGE_REPORTING_TASK_TYPE}`
@@ -111,10 +114,11 @@ export class ConnectorUsageReportingTask {
 
     if (!this.projectId) {
       this.logger.warn(
-        `Missing required project id while running ${CONNECTOR_USAGE_REPORTING_TASK_TYPE}`
+        `Missing required project id while running ${CONNECTOR_USAGE_REPORTING_TASK_TYPE}, reporting task will be deleted`
       );
       return {
         state,
+        shouldDeleteTask: true,
       };
     }