build

fix(dedupe): use a common blobs dir to simplify #4988

Job	Run time
Build ZOT multiarch (windows, arm64)	1m 45s
Build ZOT multiarch (freebsd, arm64)	1m 59s
Build ZOT multiarch (linux, arm64)	2m 21s
Build ZOT multiarch (darwin, arm64)	2m 33s
Build ZOT multiarch (linux, amd64)	2m 18s
Build ZOT multiarch (freebsd, amd64)	1m 54s
Build ZOT multiarch (windows, amd64)	1m 41s
Build ZOT multiarch (darwin, amd64)	1m 52s
Release Artifact Checksums	0s
	16m 23s

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