Allow config option for HTTP method for uploads (Artifactory)

[rfdickerson]

Use case

Our MLE team at Expedia Group uses JFrog's Artifactory for storing binary artifacts. While Artifactory supports an HTTP/HTTPS interface, instead of POST it only accepts PUT for the new artifacts. This PR provides an alternative in this case.

Documentation change:
iterative/dvc.org#1769

JFrog Artifactory HTTP REST API

• ❗ I have followed the Contributing to DVC checklist.

• 📖 If this PR requires documentation updates, I have created a separate PR (or issue, at least) in dvc.org and linked it here.

Thank you for the contribution - we'll try to review it as soon as possible. 🙏

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This change is 

[efiop]

Could you please contribute a doc fix for HTTP in https://dvc.org/doc/command-reference/remote/modify to include this new config option?

And one more thing, I see that github is not able to tie your commit's author with your github profile. Likely you just need to add the email used in those commits to https://github.com/settings/emails

[dmpetrov]

JFrog's Artifactory for storing binary artifacts

it only accepts PUT for the new artifacts

@rfdickerson thank you for this Artifactory insight and the change 🚀

We had an internal discussion about a month ago regarding possible integration with tools like Artifactory and realized that we are lacking hands-on experience with these tools.

I'd really appreciate it if you could share your experience. Please let me know if we can set up a quick chat - I can shoot an email to the address from your profile.

[rfdickerson]

@dmpetrov would love a quick chat and maybe a quick screen share demo of it working. My Expedia address should work fine.

[efiop]

Thank you @rfdickerson ! 🙏