S3 Cache: Use multipart upload instead of CopyObject for touching file > 5GB #4623

Job	Run time
govulncheck	57s
prepare	5s
binaries (darwin/amd64)	1m 4s
binaries (darwin/arm64)	1m 3s
binaries (linux/amd64)	1m 59s
binaries (linux/arm/v7)	2m 3s
binaries (linux/arm64)	2m 8s
binaries (linux/s390x)	2m 3s
binaries (linux/ppc64le)	2m 2s
binaries (linux/riscv64)	2m 7s
binaries (windows/amd64)	1m 51s
binaries (windows/arm64)	1m 45s
test / prepare	1m 59s
test / run (containerd, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integration)	7m 56s
test / run (containerd-rootless, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integr...	9m 38s
test / run (containerd-1.6, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integration)	7m 40s
test / run (containerd-snapshotter-stargz, ./client ./cmd/buildctl ./worker/containerd ./solver ./fronte...	8m 44s
test / run (oci, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integration)	5m 19s
test / run (oci-rootless, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integration)	4m 52s
test / run (oci-rootless-slirp4netns-detachnetns, ./client ./cmd/buildctl ./worker/containerd ./solver ....	5m 55s
test / run (oci-snapshotter-stargz, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, int...	5m 11s
test / run (./..., 1, integration gateway)	4m 13s
test / run (./client, containerd, nydus, integration)	7m 40s
test / run (./client, oci, nydus, integration)	5m 6s
test / run (./..., nydus, 1, integration)	4m 51s
image	8m 39s
image (rootless)	8m 54s
release	7s
scout	0s
	1h 55m 51s

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