solver: infer builder id from user input for provenance in build record #2818

Job	Run time
prepare	1s
test / prepare	1m 48s
test / run (containerd, ./frontend/dockerfile, integration)	4m 56s
test / run (containerd, ./frontend/dockerfile, dockerfile)	6m 3s
test / run (containerd-rootless, ./frontend/dockerfile, integration)	4m 38s
test / run (containerd-rootless, ./frontend/dockerfile, dockerfile)	6m 47s
test / run (containerd-1.6, ./frontend/dockerfile, integration)	4m 42s
test / run (containerd-1.6, ./frontend/dockerfile, dockerfile)	6m 16s
test / run (containerd-snapshotter-stargz, ./frontend/dockerfile, integration)	4m 57s
test / run (containerd-snapshotter-stargz, ./frontend/dockerfile, dockerfile)	6m 49s
test / run (oci, ./frontend/dockerfile, integration)	4m 28s
test / run (oci, ./frontend/dockerfile, dockerfile)	8m 1s
test / run (oci-rootless, ./frontend/dockerfile, integration)	4m 26s
test / run (oci-rootless, ./frontend/dockerfile, dockerfile)	5m 35s
test / run (oci-rootless-slirp4netns-detachnetns, ./frontend/dockerfile, integration)	4m 12s
test / run (oci-rootless-slirp4netns-detachnetns, ./frontend/dockerfile, dockerfile)	5m 25s
test / run (oci-snapshotter-stargz, ./frontend/dockerfile, integration)	4m 33s
test / run (oci-snapshotter-stargz, ./frontend/dockerfile, dockerfile)	5m 59s
image (mainline)	4m 58s
image (labs)	4m 54s
release	0s
	1h 39m 28s

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