Merge pull request #49150 from robmry/live_restore_fixes #735

Job	Run time
validate-dco / run	17s
build	1m 57s
test (dockerd, client, integration)	17m 1s
test (dockerd, cmd/buildctl, integration)	8m 15s
test (dockerd, solver, integration)	8m 9s
test (dockerd, frontend, integration)	8m 10s
test (dockerd, frontend/dockerfile, integration)	22m 5s
test (dockerd-containerd, client, integration)	19m 13s
test (dockerd-containerd, cmd/buildctl, integration)	8m 15s
test (dockerd-containerd, solver, integration)	8m 7s
test (dockerd-containerd, frontend, integration)	8m 6s
test (dockerd-containerd, frontend/dockerfile, integration)	23m 47s
	2h 13m 22s

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