v2023.12.30

Upstream changes

• Merge branch 'feature/early-fail-disallowed-redirects' into 'master'
• Perform validation of redirect URLs during the redirect process.
• Merge branch 'feature/use-guzzle' into 'master'
• Fix specifying auth type in UrlHelper::fetch(), add a test for 403 auth retry.
• Appease PHPStan in UrlHelperTest
• Add some tests for UrlHelper::fetch()
• Ensure the feed name is easily visible when looking at the feeds with errors list.
• Rework content encoding error retrying in UrlHelper::fetch()
• Clean up UrlHelper::resolve_redirects().
• Add back 'any auth' retry in UrlHelper::fetch()
• Use Guzzle