Extract field metadata build out of object metadata build (#14763)

# Introduction

Extracting the legacy fields build and dispatch out of the object one to
follow the generic flat entity build, also update caches entries for
object

## Main tasks
- flat field map cache
- flat field builder
- refactored the dispatch matrix to return flat entity maps instead of
flat entity arrays
- orchestrator aggregator
- removing legacy code
- making universal identifier aka standardId of standard field for
custom object deterministically dynamic
- perfs debug logs for v2

## TODO
- [x] Refactor the generic entity builder to be dependency flat maps in
order to main foreign keys list in flat parent
- [x] Refactor the flat object metadata to contain the array of related
fields and avoid costy find object fields
- [ ] Improve the create field handler to handle multiple field at once
- [ ] Refactor the dispatch to embbed the comparison
- [ ] Improve perf by extracting from elements out of existing
- [ ] Fix the labelIdentifierId validators on object before field
creation ( integ tests are in failing mode )

## Debug logs snippet

```ts
[EntityBuilder fieldMetadata] matrix computation: 0.027ms
[EntityBuilder fieldMetadata] creation validation: 0.001ms
[EntityBuilder fieldMetadata] deletion validation: 0.293ms
[EntityBuilder fieldMetadata] update validation: 0.006ms
[EntityBuilder fieldMetadata] entity processing: 0.363ms
[EntityBuilder fieldMetadata] validateAndBuild: 0.455ms
[EntityBuilder index] matrix computation: 0.005ms
[EntityBuilder index] creation validation: 0.001ms
[EntityBuilder index] deletion validation: 0.146ms
[EntityBuilder index] update validation: 0.004ms
[EntityBuilder index] entity processing: 0.199ms
[EntityBuilder index] validateAndBuild: 0.228ms
[Runner] Initial cache retrieval: 0.549ms
[BaseWorkspaceMigrationRunnerActionHandlerService] delete_index executeForWorkspaceSchema: 11.665ms
[BaseWorkspaceMigrationRunnerActionHandlerService] delete_index executeForMetadata: 12.864ms
[BaseWorkspaceMigrationRunnerActionHandlerService] delete_field executeForWorkspaceSchema: 1.476ms
[BaseWorkspaceMigrationRunnerActionHandlerService] delete_field executeForMetadata: 6.816ms
[BaseWorkspaceMigrationRunnerActionHandlerService] delete_field executeForWorkspaceSchema: 0.062ms
[BaseWorkspaceMigrationRunnerActionHandlerService] delete_field executeForMetadata: 0.889ms
[Runner] Transaction execution: 23.434ms
[Runner] Cache invalidation: 316.662ms
[Runner] Total execution: 340.767ms
```
As you can see cache invalidation is way to long, we could replace the
cache by the optimistic in the end

packages/twenty-server/src/engine/metadata-modules/index-metadata/utils/generate-flat-index.util.ts

@@ -4,6 +4,7 @@ import {
   FlatEntityMapsException,
   FlatEntityMapsExceptionCode,
 } from 'src/engine/core-modules/common/exceptions/flat-entity-maps.exception';
+import { type FlatFieldMetadata } from 'src/engine/metadata-modules/flat-field-metadata/types/flat-field-metadata.type';
 import { isMorphOrRelationFlatFieldMetadata } from 'src/engine/metadata-modules/flat-field-metadata/utils/is-morph-or-relation-flat-field-metadata.util';
 import { type FlatIndexMetadata } from 'src/engine/metadata-modules/flat-index-metadata/types/flat-index-metadata.type';
 import { type FlatObjectMetadata } from 'src/engine/metadata-modules/flat-object-metadata/types/flat-object-metadata.type';
@@ -11,20 +12,21 @@ import { generateDeterministicIndexNameV2 } from 'src/engine/metadata-modules/in
 
 type GenerateFlatIndexArgs = {
   flatObjectMetadata: FlatObjectMetadata;
+  objectFlatFieldMetadatas: FlatFieldMetadata[];
   flatIndex: Omit<FlatIndexMetadata, 'name'>;
 };
 export const generateFlatIndexMetadataWithNameOrThrow = ({
   flatObjectMetadata,
+  objectFlatFieldMetadatas,
   flatIndex,
 }: GenerateFlatIndexArgs): FlatIndexMetadata => {
   const orderedFlatFieldNames = flatIndex.flatIndexFieldMetadatas
     .sort((a, b) => a.order - b.order)
     .map((flatIndexField) => {
-      const relatedFlatFieldMetadata =
-        flatObjectMetadata.flatFieldMetadatas.find(
-          (flatFieldMetadata) =>
-            flatFieldMetadata.id === flatIndexField.fieldMetadataId,
-        );
+      const relatedFlatFieldMetadata = objectFlatFieldMetadatas.find(
+        (flatFieldMetadata) =>
+          flatFieldMetadata.id === flatIndexField.fieldMetadataId,
+      );
 
       if (!isDefined(relatedFlatFieldMetadata)) {
         throw new FlatEntityMapsException(