ci: Move IMAGE_TAG Dockerfile ARG into build phase (backport k239) #16212
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In order to access the variable ${IMAGE_TAG} that is provided as `--build-arg IMAGE_TAG=x.x.x` in the `docker build` command, the `ARG` definition in the Dockerfile needs to be inside the build step block, otherwise it is empty.
Signed-off-by: Christian Haudum <christian.haudum@gmail.com>
(cherry picked from commit ed061b3)
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Backport ed061b3 from #15983
What this PR does / why we need it:
In order to access the variable ${IMAGE_TAG} that is provided as
--build-arg IMAGE_TAG=x.x.xin thedocker buildcommand, theARGdefinition in the Dockerfile needs to be inside the build step block, otherwise it is empty.Special notes for your reviewer:
Fix for ##15939