global expressions support for labels and annotations #7006

Job	Run time
multi-images	7s
tag-match (\d.\d.\d, 0)	7s
tag-match (\d.\d, 0)	7s
tag-match (v(.*), 1)	6s
docker-push	18s
context (workflow)	4s
custom-labels-annotations	6s
context (git)	4s
bake	16s
flavor	8s
global-exps	10s
images	6s
json	10s
tag-schedule	6s
tag-semver (auto)	10s
tag-schedule (cron-{{date 'YYYYMMDD'}})	9s
tag-semver (true)	9s
tag-schedule ({{date 'YYYYMMDD-HHmmss'}})	11s
tag-semver (false)	11s
tag-schedule (schedule)	9s
bake-cwd	27s
bake-annotations	21s
dump	14s
no-images	8s
output-env	24s
sep-tags ( )	6s
sha-short	6s
sep-tags (,)	11s
sha-short (16)	6s
	4m 57s

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