Makes it so that `setup.sh` doesn't make changes in
`runtimeclass_workloads/` directly. Instead we treat that as a template
directory and we use the new directory `runtimeclass_workloads_work/` as
a work dir.
This has two advantages:
* Allows rerunning tests without the assumption that `setup.sh` must be
idempotent. E.g. the `set_runtime_class()` step would break.
* Doesn't pollute your git environment with a bunch of changes when
developing.
Signed-off-by: Aurélien Bombo <abombo@microsoft.com>
d7f04a64a0