list-targets: Allow passing multi-line files #2014

Job	Run time
bake (default)	23s
error-check	4s
bake (release)	16s
error-msg	5s
provenance	24s
source	24s
provenance (mode=max)	17s
standalone	11s
docker-config-malformed	10s
provenance (builder-id=foo)	21s
provenance (false)	14s
group	17s
sbom (image, type=image,name=localhost:5000/name/app:latest,push=true)	15s
provenance (true)	20s
set	23s
sbom (binary, /tmp/bake-build)	15s
git-context	25s
git-context-and-local	33s
proxy-buildkitd	18s
proxy-docker-config	21s
load-and-push	24s
multi-output	29s
summary-disable	10s
summary-disable-deprecated	8s
annotations-disabled	21s
checks (latest)	12s
record-retention-days (2)	16s
record-upload-disable	21s
checks (v0.14.1)	17s
summary-not-supported	13s
record-retention-days (0)	24s
allow	13s
	9m 24s

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