fix: unable to remove image from employee

[asmitahase]

Current Premise

1. Employee image is "fetched from" user doctype, with "Fetch on save if empty" checked, but this only works on server side. For example create an employee attach an image to it, don't link user_id just yet. Create a user, don't attach any image to it. Now from system console, link the user to the employee. The image won't be overwritten.
2. "Fetch on save if empty" isn't meant to work client side, as soon as you set a value in a linked field, for example user_id, all fields of employee that depend on user, in this case image, should be updated regardless of if they are empty or not. This use-case explains why

The Problem

This, because the user is created after employee

Screen.Recording.2025-02-07.at.6.11.41.PM.mov

After

Screen.Recording.2025-02-07.at.6.36.08.PM.mov

Removing fetch from also solves the problem of not being able to remove image from employee, because it would be refetched as soon as it was removed.