MorkBuild: minor updates and fixes

[analogrelay]

• Whitespace cleanup (XML indent -> 2 to match VS defaults)
• Namespace resync (NuGetReplayLogger got accidentally dragged into the Tasks namespace, but it isn't a task)
• Fix hidden messages on Unix (due to using ANSI code for Black, which yields black-on-black in most terminals ;))
• Copy MSBuild/KoreBuild logs to artifacts after build (can't do it in the build because it locks artifacts which means we can't really clean it)
• Update artifacts final layout to match KoreBuild
• Apparently @victorhurdugaci says we're calling this new MSBuild-based KoreBuild "MorkBuild" and well...

ALSO: Removed KOREBUILD_COMPATIBILITY. Turns out Universe will need to call different targets anyway, which means it needs to "detect" KoreBuild2 already :(. May as well just remove the compat stuff now then.

/cc @pranavkm @victorhurdugaci

[analogrelay]

/cc @moozzyk

[pranavkm]

:shipit:

[analogrelay]

:up: :date:

• Address PR Feedback
• Move all args to "RSP" file and put it in artifacts after the build
• Improve handling of Log/RSP files when builds fail (i.e. make sure they always end up in artifacts, regardless of the build outcome)
• Add #Requires -Version 4 to PowerShell files just to be cautious

[analogrelay]

One more :up: :date: - I added a target that UniverseCoherence can call so it can be isolated from the specific layout of targets.