Add management command to delete redirects to torchbox.com on staging

[helenb]

Description of Changes Made

On staging we have a bunch of redirects which all point to a torchbox.com url. This is as a result of importing the production data. It's potentially very confusing, as people might not notice the redirect - and in a worst case scenario they might accidentally edit a live page with a test thinking they are on staging. This PR adds a management command that allows you to delete all redirects pointing to a http://torchbox.com url. At the moment it excludes any media.torchbox.com redirects.

How to Test

Try running the script in your local build. Note that as a precaution it can't be run in production.

Screenshots

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MR Checklist

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Unit tests

• Added
• Not required

Documentation

• Updated build docs
• Updated editor guidelines (See https://intranet.torchbox.com/torchbox-com-project-docs for the private link, for Torchbox employees only)
• Updated field spec (See https://intranet.torchbox.com/torchbox-com-project-docs for the private link, for Torchbox employees only)
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Browser testing

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Light and dark mode

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Accessibility

• Automated WCAG 2.1 tests pass
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Sustainability

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Pattern library

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