Refactor flat entity maps to be universal oriented (#17665)

# Introduction
In preparation of the workspace agnostic builder, we're migrating
`FlatEntityMaps` to be universal identifier oriented and based
As in the builder context there're won't be any ids at all
Please also note that the FlatEntity is a UniversalFlatEntity superset

From
```ts
import { type SyncableFlatEntity } from 'src/engine/metadata-modules/flat-entity/types/flat-entity-from.type';

export type FlatEntityMaps<T extends SyncableFlatEntity> = {
  byId: Partial<Record<string, T>>;
  idByUniversalIdentifier: Partial<Record<string, string>>;
  universalIdentifiersByApplicationId: Partial<Record<string, string[]>>;
};
```

To
```ts
export type FlatEntityMaps<
  T extends SyncableFlatEntity | UniversalSyncableFlatEntity,
> = {
  byUniversalIdentifier: Partial<Record<string, T>>;
  universalIdentifierById: Partial<Record<string, string>>;
  universalIdentifiersByApplicationId: Partial<Record<string, string[]>>; // this might make more sense to be migrated to universalIdentifiersByApplicationUniversalIdentifier but it's the main topic of this PR
};
```

## Low level maps tools
Had to refactor find | create | delete | replace | find-many | get-sub
tools ( through mutations and or throw equivalent )

packages/twenty-server/src/engine/metadata-modules/row-level-permission-predicate/services/row-level-permission-predicate-group.service.ts

@@ -45,7 +45,9 @@ export class RowLevelPermissionPredicateGroupService {
         },
       );
 
-    return Object.values(flatRowLevelPermissionPredicateGroupMaps.byId)
+    return Object.values(
+      flatRowLevelPermissionPredicateGroupMaps.byUniversalIdentifier,
+    )
       .filter(isDefined)
       .filter((group) => group.deletedAt === null)
       .sort(
@@ -75,7 +77,9 @@ export class RowLevelPermissionPredicateGroupService {
         },
       );
 
-    return Object.values(flatRowLevelPermissionPredicateGroupMaps.byId)
+    return Object.values(
+      flatRowLevelPermissionPredicateGroupMaps.byUniversalIdentifier,
+    )
       .filter(isDefined)
       .filter((group) => group.deletedAt === null && group.roleId === roleId)
       .sort(

packages/twenty-server/src/engine/metadata-modules/row-level-permission-predicate/services/row-level-permission-predicate.service.ts

@@ -60,7 +60,9 @@ export class RowLevelPermissionPredicateService {
         },
       );
 
-    return Object.values(flatRowLevelPermissionPredicateMaps.byId)
+    return Object.values(
+      flatRowLevelPermissionPredicateMaps.byUniversalIdentifier,
+    )
       .filter(isDefined)
       .filter((predicate) => predicate.deletedAt === null)
       .sort(
@@ -91,7 +93,9 @@ export class RowLevelPermissionPredicateService {
         },
       );
 
-    return Object.values(flatRowLevelPermissionPredicateMaps.byId)
+    return Object.values(
+      flatRowLevelPermissionPredicateMaps.byUniversalIdentifier,
+    )
       .filter(isDefined)
       .filter(
         (predicate) =>
@@ -173,7 +177,7 @@ export class RowLevelPermissionPredicateService {
       );
 
     const existingPredicates = Object.values(
-      flatRowLevelPermissionPredicateMaps.byId,
+      flatRowLevelPermissionPredicateMaps.byUniversalIdentifier,
     )
       .filter(isDefined)
       .filter(
@@ -184,7 +188,7 @@ export class RowLevelPermissionPredicateService {
       );
 
     const existingGroups = Object.values(
-      flatRowLevelPermissionPredicateGroupMaps.byId,
+      flatRowLevelPermissionPredicateGroupMaps.byUniversalIdentifier,
     )
       .filter(isDefined)
       .filter(
@@ -239,7 +243,9 @@ export class RowLevelPermissionPredicateService {
         },
       );
 
-    const resultPredicates = Object.values(updatedPredicateMaps.byId)
+    const resultPredicates = Object.values(
+      updatedPredicateMaps.byUniversalIdentifier,
+    )
       .filter(isDefined)
       .filter(
         (predicate) =>
@@ -249,7 +255,7 @@ export class RowLevelPermissionPredicateService {
       )
       .map(fromFlatRowLevelPermissionPredicateToDto);
 
-    const resultGroups = Object.values(updatedGroupMaps.byId)
+    const resultGroups = Object.values(updatedGroupMaps.byUniversalIdentifier)
       .filter(isDefined)
       .filter(
         (group) =>
@@ -295,8 +301,10 @@ export class RowLevelPermissionPredicateService {
 
       inputGroupIds.add(groupId);
 
-      const existingGroup =
-        flatRowLevelPermissionPredicateGroupMaps.byId[groupId];
+      const existingGroup = findFlatEntityByIdInFlatEntityMaps({
+        flatEntityId: groupId,
+        flatEntityMaps: flatRowLevelPermissionPredicateGroupMaps,
+      });
 
       if (isDefined(existingGroup) && existingGroup.deletedAt === null) {
         groupsToUpdate.push({
@@ -377,8 +385,10 @@ export class RowLevelPermissionPredicateService {
 
       inputPredicateIds.add(predicateId);
 
-      const existingPredicate =
-        flatRowLevelPermissionPredicateMaps.byId[predicateId];
+      const existingPredicate = findFlatEntityByIdInFlatEntityMaps({
+        flatEntityId: predicateId,
+        flatEntityMaps: flatRowLevelPermissionPredicateMaps,
+      });
 
       if (
         isDefined(existingPredicate) &&