chore(kopia): rename `kopia` to `kopia-b2` #1663

Job	Run time
Changed Clusters	3s
Flux Diff (kubernetes/main, helmrelease)	21s
Flux Diff (kubernetes/main, kustomization)	20s
Flux Diff (kubernetes/storage, helmrelease)	18s
Flux Diff (kubernetes/storage, kustomization)	21s
Flux Diff Successful	1s
	1m 24s

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