Disable OCI cache usage for jobs w/o install prefix "/esd"

Changes in CI file allow to use existing spack deployments w/o cache. Disables the use of the cache for all jobs that don't install packages to /esd/vendor/spack/opt/spack/… as we can't guarantee that the relocation will work (it is known that, e.g., R includes absolute paths to tools like which breaking any relocation atm).