[GR-77371] Add layered workflow for reachability metadata #2

Job	Run time
call-template / Populate matrix	1m 11s
call-template / build-graalvm / Build GraalVM	7m 58s
call-template / Build layered base	1m 21s
call-template / matrix.coordinates	0s
call-template / Layered metadata tests	0s
	10m 30s

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