Fix workspace relation sync (#11963)

## Context

While deploying the IS_NEW_RELATION_ENABLED (we don't compute relation
based on relationMetadata anymore) to existing workspace, I've tested to
run a sync-metadata post feature flag activation. This has raised two
issues:
- the workspaceMigration generator (which is over-complex and should be
refactored later) for fieldMetadata of type RELATION was not handling
settings update properly ;
- we need to delete existing fieldMetadata corresponding to the UUID
foreignKey as they are not needed anymore. This is handled as a 0.53
upgrade command as 0.53 will also come with the full removal of the old
relation system

---------

Co-authored-by: Etienne <45695613+etiennejouan@users.noreply.github.com>
Co-authored-by: prastoin <paul@twenty.com>

packages/twenty-server/src/database/commands/upgrade-version-command/upgrade.command.ts

@@ -1,7 +1,7 @@
 import { InjectRepository } from '@nestjs/typeorm';
 
-import { Repository } from 'typeorm';
 import { Command } from 'nest-commander';
+import { Repository } from 'typeorm';
 
 import {
   AllCommands,