Goal fields should be readonly in performance document but editable on Goals page for worker

Summary:

Need EL for this case: Goal Measurements field should be editable in performance document but readonly on Goals page for worker.

Goal Measurement page: Actual Value (Employee) should be read only for Worker

Goal Measurement(Performance Document): Actual Value (Employee) should be editable for Worker

Goal Measurement page: Actual Value (Manager) should be read only for Worker & Manager

Goal Measurement(Performance Document): Actual Value (Manager) should be editable for Manager

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