Pull Request: Horde: Add Microsoft Teams notification support

I would like to highlight a pull request that I currently have open: https://github.com/EpicGames/UnrealEngine/pull/14167

It has already received some feedback, but I would like to get a few more eyes on it.

This PR adds basic Microsoft Teams notification support to Horde’s notification system.

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Hey there,

I’ll bring this up in our next team meeting.

Kind regards,

Julian

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