Reduce ResourceKey's responsibility (#5451) #1293

Job	Run time
artifacts (ghcr.io/pipe-cd, helloworld)	6m 43s
artifacts (ghcr.io/pipe-cd, launcher)	8m 32s
artifacts (ghcr.io/pipe-cd, launcher-okd)	8m 48s
artifacts (ghcr.io/pipe-cd, pipecd)	20m 29s
artifacts (ghcr.io/pipe-cd, piped)	19m 17s
artifacts (ghcr.io/pipe-cd, piped-okd)	19m 0s
artifacts (ghcr.io/pipe-cd, pipectl)	6m 59s
artifacts (gcr.io/pipecd, helloworld)	6m 45s
artifacts (gcr.io/pipecd, launcher)	8m 34s
artifacts (gcr.io/pipecd, piped)	19m 1s
release-quickstart-manifests	0s
	2h 4m 8s

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