Accelerate Maven artifact repository uploads

This MR implements Accelerate uploads for gitlab-org/gitlab-ee!6607 implementing https://gitlab.com/gitlab-org/gitlab-ee/issues/5811

Maven uploads files using the message body (like LFS). here we are extracting a configurable BodyUploader that we can use for both kind of uploads

@dzaporozhets this should be enough for your MR.

If you are unfamiliar with workhorse development in gdk, you can simply do this

# in your gdk root
cd gitlab-workhorse/src/gitlab.com/gitlab-org/gitlab-workhorse/
git fetch git@gitlab.com:nolith/gitlab-workhorse.git accelerate-mvn
git checkout -b nolith/gitlab-workhorse-accelerate-mvn FETCH_HEAD
cd ../../../../../
make gitlab-workhorse/bin/gitlab-workhorse

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• be905298 - Extract BodyUploader from lfs package

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@jacobvosmaer-gitlab can you perform a preliminary review, please? 🙏

assigned to @jacobvosmaer-gitlab

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assigned to @nolith

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• a41dcd9f - Never reuse lfs information
• 4b688ca1 - Avoid double logging

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• 40f546e8 - fix typo in comment

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• 7772e9f2 - some tests

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• 9480e7cb - more tests

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• 052cc9ae - more tests

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@jacobvosmaer-gitlab I fixed the lfsStore problem and wrote some tests.

Back to you.

assigned to @jacobvosmaer-gitlab

@nolith in what gitlab version did we introduce the new uploader API? Asking because of the deprecation of support for the old API.