Fixes stricter API check on daemonset pod spec that started to cause e2e
test failures. RestartPolicyNever that we previously set (by defaylt)
isn't compatible with DaemonSets.
The new package should provide pod-related utilities,
hence let's move all the daemonset-related utilities
to their own package as well.
Signed-off-by: Talor Itzhak <titzhak@redhat.com>
By moving those utils in to a seperate package,
we can make the functions names shorter and clearer.
For example, instead of:
```
testutils.NFDWorkerPod(opts...)
testutils.NFDMasterPod(opts...)
testutils.SpecWithContainerImage(...)
```
we'll have:
```
testpod.NFDWorker(opts...)
testpod.NFDMaster(opts...)
testpod.SpecWithContainerImage(...)
```
It will also make the package more isolated and portable.
Signed-off-by: Talor Itzhak <titzhak@redhat.com>
