stage_build_artifacts does not correctly query extraBuildArtifiacts

[alexlianides]

additional artifacts added during the staging process are stored in spacefx-config.json extraBuildArtifacts.

However, stage_build_artifact.sh does not correctly query the extra build artifacts:

azure-orbital-space-sdk-setup/scripts/stage/stage_build_artifact.sh

Line 170 in 30ff9c0

run_a_script "jq -r '.config.extraArtifacts // empty | map(select(.file == \"${fileName}\")) | if length > 0 then .[0] | @base64 else \"\" end' ${SPACEFX_DIR}/tmp/config/spacefx-config.json" build_artifact --disable_log --ignore_error

[alexlianides]

@alexlianides tasked with resolving