Multiple exporter responses #5623

Job	Run time
sandbox-build (linux/amd64)	7m 0s
build (windows/amd64)	1m 53s
sandbox-build (linux/arm64)	6m 42s
build (freebsd/amd64)	1m 46s
test-freebsd-amd64	2m 46s
test-windows-amd64 (containerd, ./client)	5m 36s
test-windows-amd64 (containerd, ./cmd/buildctl)	3m 27s
test-windows-amd64 (containerd, ./worker/containerd)	2m 49s
test-windows-amd64 (containerd, ./solver)	3m 19s
test-windows-amd64 (containerd, ./frontend)	3m 39s
test-windows-amd64 (containerd, ./frontend/dockerfile)	43m 18s
test-windows-amd64 (./..., 1)	5m 37s
	1h 27m 52s

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