Deletion request approval and API update

[JV0812]

Purpose of this pull request

This pull request is to add the below information:

• Add information about the deletion request approval.
• Create the Data Deletion Data API doc

Select the type of change

• Minor Changes - Typos, formatting, slight revisions
• Update Content - Revisions, updating sections
• New Content - New features, sections, pages, tutorials
• Site and Tools - .clabot, version updates, maintenance, dependencies, new packages for the site (Docusaurus, Gatsby, React, etc.)

Ticket (if applicable)

Add Approving request section in data deletion documentation