Posting Description Region while creating Job Requisition should be non-editable

Summary:

Customer Ask: The ability to make a posting description section/region under the Job Requisition creation page for some positions should be non-editable.

Neither the Hiring Manager nor the Recruiter should be able to edit this section. Content of the Posting Description will be fetched from the Position and remain as it is.

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Code Snippet (add any code snippets that support your topic, if applicable):