Split upload and download urls

[AbrilRBS]

Changelog: (Feature | Fix | Bugfix): Describe here your pull request
Docs: https://github.com/conan-io/docs/pull/XXXX

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^{Note: By default this PR will skip the slower tests and will use a limited set of python versions. Check here how to increase the testing level by writing some tags in the current PR body text.}

[memsharded]

perfect