Switch to using the Dynamic Aggregates API as the Metric Aggregation
API is deprecated.
When using the Dynamic Aggregates API, any aggregation using rates
can use the underlying base measures for the aggregation rather than
the rate, for example:
(aggregation rate:mean (metric cpu mean))
The tuple of data for each record returned via this API is encapsulated
with information about the aggregation used so adapt the sanitization
function to deal with this and the formatting of the metrics measures
API as well.
Change-Id: I4f631d224404460138f4050b1b981d577b592544
Closes-Bug: 1946793
74eadfbd58