Add preliminary repository for Microsoft software

[sloanebernstein]

Microsoft publishes an RPM in their repos which provides a canonical YUM repo file; however, it seems to be common practice not to use this package-owned file. This makes the upgrade more trouble than it should be. Instead, make sure that the package is installed during the update, and then rename the old manual repo file to disable it on first boot into the new OS.

The actors all depend on the accompanying PES vendor in order to do anything. See AlmaLinux/leapp-data#30 for that commit.

[github-actions]

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[andrewlukoshko]

Hello and thanks for contribution.
We're going to rebase AlmaLinux's leapp-repository to latest upstream, see explanation here:
#86 (comment)
So this PR will need to be updated to target almalinux-ng branch when 3rd party repos support there is ready.
Current stable almalinux branch is now obsolete. I'll keep you updated.