[6.2] fix: DownloadTaskManager handle redirect authentication

[vsarunas]

• Explanation:
  • Fix download of private artifact bundles on GitHub; which now involves a redirect to another domain to which authentication header should not be sent. Fixes Private Artifact Bundle downloads sometimes fail with 403 error #8946
  • DataTaskManager has a redirect handler, but DownloadTaskManager does not. Pass authorizationProvider to DownloadTaskManager in order to set correct authorization headers for cases when there is a redirect to a new domain.
• Scope: Package resolution when using private artifact bundles
• Issues: Private Artifact Bundle downloads sometimes fail with 403 error #8946
• Original PRs: fix: DownloadTaskManager handle redirect authentication #8947
• Risk: Low.
• Testing: Regression test added.
• Reviewers: @plemarquand

[vsarunas]

Hi @plemarquand,

I can't seem to add a reviewers for the cherry-pick.

[bnbarham]

@swift-ci please test

[plemarquand]

@vsarunas The swift-branch-managers are automatically added to and PRs targeting 6.2, and 6.2 PRs can only be approved by one of them. I've looped @bnbarham in and updated the PR message to match the 6.2 PR message template.