Coverage=user #1
Description
I noticed gigabytes of coverage files when inspecting agent storage, e.g. /storage/buildkite/rtx2080/.local/opt/julia-1.6-nightly/share/julia/base/task.jl.14289.cov. Are we invoking the coverage flag incorrectly? Maybe extracting the tarball in julia-buildkite-plugin should also ensure the resulting folder is clean.