ci/integration: move the packages needed to the base container
This will speed up integration testing while also reducing:
- bandwidth requirements at the CI farms (no big downloads)
- instability of execution (arch repo down, changes in GPG keys)
Additionally, this patch installs the executorctl directly rather than in a virtual env, since the container's filesystem isn't shared with the virtual machine nor does it remain after job execution.
This increases the installed size of valve-infra-base-container by about 350 MiB:
- Buildah: 47.41 MiB
- Shellcheck: 280 MiB
- socat: 500 kiB
- sudo: 7.10 MiB
- yq: 2.91 MiB