Refactor isReadOnly + introduce restrictedFields (#13533)

Closes https://github.com/twentyhq/core-team-issues/issues/1276 

We now need to take fields permissions into account when determining if
a cell is editable or not.

a record field (= a cell) is read only if one of the condition is met:
- the object of the record is read-only (can be determined at table
level) by permission setting
- the field of the object is read-only (can be determined at column
level) - either by permission settings or by system (some workflows
fields for intance)
- the record is deleted (can be determined at row level) 

we reorganized the code to avoid re-computing known information as much
as possible.

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-front/src/modules/activities/inline-cell/components/ActivityTargetsInlineCell.tsx

@@ -37,7 +37,8 @@ export const ActivityTargetsInlineCell = ({
 
   const { closeInlineCell } = useInlineCell(componentInstanceId);
 
-  const { fieldDefinition, isReadOnly } = useContext(FieldContext);
+  const { fieldDefinition, isRecordFieldReadOnly: isReadOnly } =
+    useContext(FieldContext);
 
   const { openActivityTargetCellEditMode } =
     useOpenActivityTargetCellEditMode();