This commit adds the new API status conditions to the API types.
The field exists as a field in autoscaling/v2alpha1, and is
round-tripped through an annotation in autoscaling/v1.
There was a bug in the HPA v1 conversion logic that would occur when
a custom metric and a metric that was encoded in v1 as
targetCPUUtilizationPercentage were used at the same time. In this
case, the custom metric could overwrite the CPU metric, or vice versa.
This fixes that bug, and ensures that the fuzzer tests round-tripping
with multiple metrics.
