Summary:
Use our internally hosted mirror of azcopy, microsoft servers are unreliable.
Original commit: 23d3022e8dd30eacdcafd47b0b75695733b21790 / D41167

Test Plan: Ensured the new URLs works to download the tarball.

Reviewers: devops, steve.varnau

Reviewed By: steve.varnau

Subscribers: yugaware, devops

Differential Revision: https://phorge.dev.yugabyte.com/D41232