[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/command/command.module.ts

@@ -1,7 +1,7 @@
 import { Module } from '@nestjs/common';
 
 import { DatabaseCommandModule } from 'src/database/commands/database-command.module';
-import { FetchWorkspaceMessagesCommandsModule } from 'src/modules/messaging/commands/fetch-workspace-messages-commands.module';
+import { MessagingCommandModule } from 'src/modules/messaging/commands/messaging-command.module';
 import { WorkspaceHealthCommandModule } from 'src/engine/workspace-manager/workspace-health/commands/workspace-health-command.module';
 import { WorkspaceCleanerModule } from 'src/engine/workspace-manager/workspace-cleaner/workspace-cleaner.module';
 import { WorkspaceCalendarSyncCommandsModule } from 'src/modules/calendar/commands/workspace-calendar-sync-commands.module';
@@ -14,7 +14,7 @@ import { WorkspaceSyncMetadataCommandsModule } from 'src/engine/workspace-manage
     AppModule,
     WorkspaceSyncMetadataCommandsModule,
     DatabaseCommandModule,
-    FetchWorkspaceMessagesCommandsModule,
+    MessagingCommandModule,
     WorkspaceCalendarSyncCommandsModule,
     WorkspaceCleanerModule,
     WorkspaceHealthCommandModule,