Added NodeAlphaFeature:DynamicResourceAllocation to the Node DRA test
to fix failing containerd serial jobs. Those jobs skip tests labeled
with NodeAlphaFeature.
Removed NodeFeature:DynamicResourceAllocation label from the
tests to fix cos-cgroupv1/v2-containerd-node-e2e-serial CI jobs.
It turned out that labeling DRA Node tests as NodeFeature was
a mistake. Re-labeling with NodeAlphaFeature would not work either.
It would fail certain containerd jobs as DRA requires containerd >= 1.7
