Add Chrome MV3 support for "surrogate script" redirections

[kzar]

The extension redirects requests to common third-party scripts to subbed out "surrogate scripts". We do that instead of simply blocking the third-party scripts since this way, we avoid breaking websites that assume the APIs provided by the third-party scripts will always be present.

Reviewer: @jonathanKingston

Steps to test this PR:

1. Build the chrome-mv3 extension: npm install && npm run dev-chrome-mv3
2. Install that
3. Browse to https://www.theguardian.com/
4. Open the developer tools, switch to the "Network" panel and ensure that the following surrogate scripts are redirected: gpt.js and analytics.js.

Note: It is expected that some redirections will fail with an "net::ERR_UNSAFE_REDIRECT" error. See https://crbug.com/1361350

Automated tests:

• Unit tests
• Integration tests

Reviewer Checklist:

• Ensure the PR solves the problem
• Review every line of code
• Ensure the PR does no harm by testing the changes thoroughly
• Get help if you're uncomfortable with any of the above!
• Determine if there are any quick wins that improve the implementation

PR Author Checklist:

• Get advice or leverage existing code
• Agree on technical approach with reviewer (if the changes are nuanced)
• Ensure that there is a testing strategy (and documented non-automated tests)
• Ensure there is a documented monitoring strategy (if necessary)
• Consider systems implications

[jonathanKingston]

LGTM thanks for making the changes :)