/metrics/resource/v1alpha1 was deprecated and moved to
/metrics/resource
Renames to remove v1alpha1 from function names and matcher variables.
Pod deletion was taking multiple minutes, so set GracePeriodSeconds to 0.
Commented restart loop during test pod startup.
Move ResourceMetricsAPI out of Orphans by giving it a NodeFeature tag.
API removed in 7b7c73b#88568
Test created 6051664#73946
Most of these could have been refactored automatically but it wouldn't
have been uglier. The unsophisticated tooling left lots of unnecessary
struct -> pointer -> struct transitions.
