[messaging] remove v2 feature flag (#4845)

## Context
We are now removing Messaging V2 feature flag to use it everywhere.

## Implementation
- renaming FetchWorkspaceMessagesCommandsModule to
MessagingCommandModule to make it more generic since it it hosts all
commands related to the messaging module
- creating a crons folder inside commands and jobs crons should be named
with xxx.cron.command.ts instead of xxx.command.ts. Same for jobs, jobs
should be named with xxx.cron.job.ts. In a future PR we should make sure
those CronJobs implement a CronJob interface since it's a bit different
(a CronJob does not contain a payload compared to a Job)
- Cron commands have been renamed to "cron:$module:command" so
`fetch-all-workspaces-messages-from-cache:cron:start` has been renamed
to `cron:messaging:gmail-fetch-messages-from-cache`. Also having to
create a command to stop the cron is a bit painful to maintain so I
removed them for now, this can be easily done manually with pg-boss or
bull-mq
- Removing full-sync and partial-sync commands as they were there for
testing only, we might put them back at some point but we will have to
adapt the code anyway.
- Feature flag has been removed from the MessageChannel standard object
to make sure those new columns are created during the next sync-metadata

packages/twenty-server/src/engine/core-modules/auth/services/google-apis.service.ts

@@ -9,10 +9,6 @@ import { TypeORMService } from 'src/database/typeorm/typeorm.service';
 import { SaveOrUpdateConnectedAccountInput } from 'src/engine/core-modules/auth/dto/save-connected-account';
 import { MessageQueue } from 'src/engine/integrations/message-queue/message-queue.constants';
 import { MessageQueueService } from 'src/engine/integrations/message-queue/services/message-queue.service';
-import {
-  GmailFullSyncJob,
-  GmailFullSyncJobData,
-} from 'src/modules/messaging/jobs/gmail-full-sync.job';
 import {
   GoogleCalendarFullSyncJob,
   GoogleCalendarFullSyncJobData,
@@ -187,32 +183,13 @@ export class GoogleAPIsService {
     workspaceId: string,
     connectedAccountId: string,
   ) {
-    const isFullSyncV2Enabled = await this.featureFlagRepository.findOneBy({
-      workspaceId,
-      key: FeatureFlagKeys.IsFullSyncV2Enabled,
-      value: true,
-    });
-
-    if (isFullSyncV2Enabled) {
-      await this.messageQueueService.add<GmailFullSyncV2JobData>(
-        GmailFullSyncV2Job.name,
-        {
-          workspaceId,
-          connectedAccountId,
-        },
-      );
-    } else {
-      await this.messageQueueService.add<GmailFullSyncJobData>(
-        GmailFullSyncJob.name,
-        {
-          workspaceId,
-          connectedAccountId,
-        },
-        {
-          retryLimit: 2,
-        },
-      );
-    }
+    await this.messageQueueService.add<GmailFullSyncV2JobData>(
+      GmailFullSyncV2Job.name,
+      {
+        workspaceId,
+        connectedAccountId,
+      },
+    );
   }
 
   async enqueueGoogleCalendarFullSyncJob(