Refactor page layout tab and widgets migration (#16367)

# Introduction
Making columns nullable instead of required + metadata on the fly
migration in typeorm migration that could affect other breaking change
migrations to be run

packages/twenty-server/src/engine/workspace-manager/workspace-sync/interfaces/strict-syncable-entity.interface.ts

@@ -1,21 +0,0 @@
-import { Column, Index, JoinColumn, ManyToOne, Relation } from 'typeorm';
-
-import type { ApplicationEntity } from 'src/engine/core-modules/application/application.entity';
-
-@Index(['workspaceId', 'universalIdentifier'], {
-  unique: true,
-})
-export abstract class StrictSyncableEntity {
-  @Column({ nullable: false, type: 'uuid' })
-  universalIdentifier: string;
-
-  @Column({ nullable: false, type: 'uuid' })
-  applicationId: string;
-
-  @ManyToOne('ApplicationEntity', {
-    onDelete: 'CASCADE',
-    nullable: false,
-  })
-  @JoinColumn({ name: 'applicationId' })
-  application: Relation<ApplicationEntity>;
-}