ci: enable OpenVR for Windows packages

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Backport: release

changed milestone to %5.9 (Fall 2020)

+1

I assume supporting libs are available?

@vbolea we should include this in RC3. No big deal. Once this is merged, you can rebase !818 (merged) on release, and we can regenerate the binaries.

resolved all threads

Do: merge

merged

mentioned in commit b59aa747

mentioned in commit 04721fd6

mentioned in merge request !818 (merged)