feat: DBTP-1299 - Cross account database copy

[JohnStainsby]

Addresses https://uktrade.atlassian.net/browse/DBTP-1299

Adds the permissions required for the database copy command to work between environments in different accounts.

• https://github.com/uktrade/demodjango-deploy/pull/259
• feat: DBTP-1299 - Cross account database copy platform-tools#657
• https://github.com/uktrade/platform-end-to-end-tests/pull/42

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Checklist:

Title:

• Scope included as per conventional commits
• Ticket reference included (unless it's a quick out of ticket thing)

Description:

• Link to ticket included (unless it's a quick out of ticket thing)
• Includes tests (or an explanation for why it doesn't)
• Includes any applicable changes to the documentation in this code base
• Includes link(s) to any applicable changes to the documentation in the DBT Platform Documentation (can be to a pull request)

Tasks:

• Trigger the pull request regression tests for this branch and confirm that they are passing

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (b0614f4) to head (ad683e8).

✅ All tests successful. No failed tests found.

Additional details and impacted files

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##              main      #294   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files            1         1           
  Lines           50        50           
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  Hits            50        50           

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