list-targets: Allow passing multi-line files #2013

Job	Run time
error-msg	8s
error-check	4s
bake (default)	37s
docker-config-malformed	15s
bake (release)	26s
git-context	1m 17s
git-context-and-local	1m 16s
group	26s
load-and-push	38s
multi-output	42s
provenance	13s
proxy-buildkitd	20s
provenance (mode=max)	14s
proxy-docker-config	32s
provenance (builder-id=foo)	14s
provenance (false)	14s
sbom (image, type=image,name=localhost:5000/name/app:latest,push=true)	15s
set	28s
provenance (true)	13s
sbom (binary, /tmp/bake-build)	27s
source	1m 1s
standalone	12s
summary-disable-deprecated	12s
allow	13s
annotations-disabled	22s
checks (latest)	19s
checks (v0.14.1)	21s
record-retention-days (2)	11s
record-upload-disable	13s
record-retention-days (0)	24s
summary-disable	10s
summary-not-supported	7s
	12m 44s

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