tools/packaging/kata-deploy: Copy install_yq.sh in a dedicated script

'make kata-tarball' sometimes fails early with:

cp: cannot create regular file '[...]/tools/packaging/kata-deploy/local-build/dockerbuild/install_yq.sh': File exists

This happens because all assets are built in parallel using the same
`kata-deploy-binaries-in-docker.sh` script, and thus all try to copy
the `install_yq.sh` script to the same location with the `cp` command.
This is a well known race condition that cannot be avoided without
serialization of `cp` invocations.

Move the copying of `install_yq.sh` to a separate script and ensure
it is called *before* parallel builds. Make the presence of the copy
a prerequisite for each sub-build so that they still can be triggered
individually. Update the GH release workflow to also call this script
before calling `kata-deploy-binaries-in-docker.sh`.

Fixes #3756

Signed-off-by: Greg Kurz <groug@kaod.org>

.github/workflows/release.yaml

@@ -26,6 +26,7 @@ jobs:
 
       - name: Build ${{ matrix.asset }}
         run: |
+          ./tools/packaging/kata-deploy/local-build/kata-deploy-copy-yq-installer.sh
           ./tools/packaging/kata-deploy/local-build/kata-deploy-binaries-in-docker.sh --build="${KATA_ASSET}"
           build_dir=$(readlink -f build)
           # store-artifact does not work with symlink