feat(ci): download previous report from portal if available

[matejchalk]

For CI environments were artifact caching is difficult to configure (e.g. CircleCI), caching the previous report from the portal is a good alternative.

This PR implements a zero-config version where we check for upload configuration in print-config output and, if it's present, we prioritize fetching the previous report from portal (reusing same server parameters) rather than CI artifacts.

In a follow-up PR, I'll implement an optimized version where a monorepo user can provide their persist and upload config patterns upfront in order to not waste time on running print-config commands. This is related to:

• Avoid sequential commands in CI monorepo mode #1043