Register system index descriptors through SystemIndexPlugin.getSystem… #2013

Job	Run time
windows-build (11)	4m 1s
macos-build (11)	8m 18s
windows-build (17)	3m 57s
macos-build (17)	8m 23s
windows-build (21)	5m 36s
Get-CI-Image-Tag / Get-CI-Image-Tag	4s
linux-build (11)	1m 22s
linux-build (17)	1m 27s
linux-build (21)	1m 18s
	34m 26s

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