server_facts: Switch from legacy to structured facts #278

Job	Run time
spec (windows-latest ruby 2.7 \| puppet ~> 7.0) / spec	5m 12s
spec (ubuntu-latest ruby 2.7 \| puppet ~> 7.0) / spec	38s
spec (ubuntu-latest ruby 3.2 \| puppet ~> 8.0) / spec	28s
spec (windows-latest ruby 3.2 \| puppet ~> 8.0) / spec	2m 39s
	8m 57s

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