Link users to use account deletion form

What does this MR do and why?

The email address in https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/views/profiles/accounts/show.html.haml#L88 needs to be updated to point to: Personal Data Request Form.

This will direct the user to the Personal Data Request form, in order to have their request processed. The request will then be serviced when received in the Personal Account Requests Service Desk.

• Support Workflow: https://about.gitlab.com/handbook/support/workflows/personal_data_access_account_deletion.html#workflows

Screenshots or screen recordings

Before:

After:

How to set up and validate locally

1. Sign-up with GitHub using https://gitlab.com/users/sign_up
2. Accept the terms
3. Navigate to https://gitlab.com/-/profile/account
4. Check description under Delete account

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

cc: @cynthia @ffarukh