Refactor workspace migration update action (#17701)

# Introduction
Removing:
- `from` property from actions definition, as it's a legitimate source
of truth. The stored comparison might have been compromised since action
generation. If from is needed it should be computed from the optimistic
cache at runner lvl
- Removed the `FlatEntityPropertyUpdates` Array complexity in favor of

From
```ts
export type PropertyUpdate<T, P extends keyof T> = {
  property: P;
} & FromTo<T[P]>;
```

To
```ts
export type FlatEntityUpdate<T extends AllMetadataName> = Partial<
  Pick<
    MetadataFlatEntity<T>,
    Extract<FlatEntityPropertiesToCompare<T>, keyof MetadataFlatEntity<T>>
  >
>;
```

## New interactions
From
```ts
    const positionUpdate = findFlatEntityPropertyUpdate({
      flatEntityUpdates,
      property: 'position',
    });

    if (
      isDefined(positionUpdate) &&
      (!Number.isInteger(positionUpdate.to) || positionUpdate.to < 0)
    ) {


   const toFlatNavigationMenuItem = {
      ...fromFlatNavigationMenuItem,
      ...fromFlatEntityPropertiesUpdatesToPartialFlatEntity({
        updates: flatEntityUpdates,
      }),
    };
```

To
```ts
    const positionUpdate = flatEntityUpdate.position;
    if (
      isDefined(positionUpdate) &&
      (!Number.isInteger(positionUpdate) || positionUpdate < 0)
    ) {

    const toFlatNavigationMenuItem = {
      ...fromFlatNavigationMenuItem,
      ...flatEntityUpdate,
    };
```

## `SanitizeFlatEntityUpdate`
Enforcing the `flatEntityUpdate` to only contains comparable properties
per flat entity by striping out all unexpected keys
In the future we will also move the whole validation at runner lvl at
some point

```ts
export const sanitizeFlatEntityUpdate = <T extends AllMetadataName>({
  flatEntityUpdate,
  metadataName,
}: {
  flatEntityUpdate: FlatEntityUpdate<T>;
  metadataName: T;
}): FlatEntityUpdate<T> => {
  const { propertiesToCompare } =
    ALL_FLAT_ENTITY_PROPERTIES_TO_COMPARE_AND_STRINGIFY[metadataName];

  const initialAccumulator: FlatEntityUpdate<T> = {};

  return propertiesToCompare.reduce((accumulator, property) => {
    const updatedValue =
      flatEntityUpdate[property as MetadataFlatEntityComparableProperties<T>];

    if (updatedValue === undefined) {
      return accumulator;
    }

    return {
      ...accumulator,
      [property]: updatedValue,
    };
  }, initialAccumulator);
};
```

packages/twenty-server/src/engine/metadata-modules/flat-page-layout-widget/services/flat-page-layout-widget-type-validator.service.ts

@@ -3,7 +3,7 @@ import { Injectable } from '@nestjs/common';
 import { msg } from '@lingui/core/macro';
 import { isDefined } from 'twenty-shared/utils';
 
-import { FlatEntityPropertiesUpdates } from 'src/engine/metadata-modules/flat-entity/types/flat-entity-properties-updates.type';
+import { FlatEntityUpdate } from 'src/engine/metadata-modules/flat-entity/types/flat-entity-properties-updates.type';
 import {
   type FlatPageLayoutWidgetTypeValidatorForCreation,
   type FlatPageLayoutWidgetTypeValidatorForUpdate,
@@ -24,7 +24,7 @@ import { FlatEntityValidationArgs } from 'src/engine/workspace-manager/workspace
 
 export type GenericValidateFlatPageLayoutWidgetTypeSpecificitiesArgs =
   FlatEntityValidationArgs<'pageLayoutWidget'> & {
-    updates?: FlatEntityPropertiesUpdates<'pageLayoutWidget'>;
+    update?: FlatEntityUpdate<'pageLayoutWidget'>;
   };
 
 export type ValidateFlatPageLayoutWidgetTypeSpecificitiesForCreationArgs =
@@ -32,7 +32,7 @@ export type ValidateFlatPageLayoutWidgetTypeSpecificitiesForCreationArgs =
 
 export type ValidateFlatPageLayoutWidgetTypeSpecificitiesForUpdateArgs =
   FlatEntityValidationArgs<'pageLayoutWidget'> & {
-    updates: FlatEntityPropertiesUpdates<'pageLayoutWidget'>;
+    update: FlatEntityUpdate<'pageLayoutWidget'>;
   };
 
 @Injectable()