[REQUIRES_CACHE_FLUSH][GQL_VIEW_GROUP_API_BREAKING_CHANGE] ViewGroup in v2 (#15052)

# Introduction
Adding view-group to core engine v2
Following https://github.com/twentyhq/twenty/pull/15010 ( same pattern )

## What's done
- Created flat-view-group
- flat view group runner
- flat view group builder
- create view group service v2 and input transpilers
- refactor the existing view group resolver to fix standard (
BREAKING_CHANGE on graphql api update especially ) REST stays the same
- refactored the front to consume the mutations autogenerated

close https://github.com/twentyhq/core-team-issues/issues/1665

packages/twenty-server/src/engine/workspace-manager/workspace-migration-v2/constant/empty-orchestrator-failure-report.constant.ts

@@ -0,0 +1,12 @@
+import { ALL_METADATA_NAME } from 'src/engine/metadata-modules/flat-entity/constant/all-metadata-name.constant';
+import { type OrchestratorFailureReport } from 'src/engine/workspace-manager/workspace-migration-v2/types/workspace-migration-orchestrator.type';
+
+export const EMPTY_ORCHESTRATOR_FAILURE_REPORT = (
+  Object.keys(ALL_METADATA_NAME) as (keyof typeof ALL_METADATA_NAME)[]
+).reduce(
+  (orchestratorReport, metadataName) => ({
+    ...orchestratorReport,
+    [metadataName]: [],
+  }),
+  {} as OrchestratorFailureReport,
+);