TreeArtifacts output directories aren't created with remote execution enabled #6393
Description
Previously: #6262
Repro:
cd $(mktemp -d)
git clone git@github.com:cushon/bazel-i6393.git
cd bazel-i6393/
bazel --bazelrc=/dev/null build --config=remote ...
ERROR: /tmp/tmp.pti7hTUec5/bazel-i6393/BUILD:3:1: error executing shell command: '/bin/bash -c cd bazel-out/k8-fastbuild/bin/a_dir && pwd' failed (Exit 1)
/bin/bash: line 0: cd: bazel-out/k8-fastbuild/bin/a_dir: No such file or directory
Target //:a failed to build