history: handle gracefulstop when history is active #5438

Job	Run time
build (windows/amd64)	1m 59s
build (freebsd/amd64)	1m 49s
test-freebsd-amd64	3m 7s
test-windows-amd64 (containerd, ./client)	4m 44s
test-windows-amd64 (containerd, ./cmd/buildctl)	2m 22s
test-windows-amd64 (containerd, ./worker/containerd)	4m 45s
test-windows-amd64 (containerd, ./solver)	2m 35s
test-windows-amd64 (containerd, ./frontend)	2m 13s
test-windows-amd64 (containerd, ./frontend/dockerfile)	35m 39s
test-windows-amd64 (./..., 1)	4m 11s
	1h 3m 24s

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