Data changes to prepare for workspaceMember page (#10439)

Workspace Member will get their own record page in the future.

This PR lays backend changes to prepare for this:
- Settings most fields on WorkspaceMember as system fields
- Renaming workspaceMember/workspaceMemberId to
forWorkspaceMember/forWorkspaceMemberId as it conflicts with the morph
relationship, if we want to be able to add a workspace member as
favorite

---------

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

packages/twenty-front/src/modules/search/hooks/__mocks__/useFilteredSearchRecordQuery.ts

@@ -96,9 +96,9 @@ export const query = gql`
                 id
                 companyId
                 createdAt
+                forWorkspaceMemberId
                 personId
                 position
-                workspaceMemberId
                 updatedAt
               }
             }