Aggregation cardinality default configuration should be experimental #3618
Description
What are you trying to achieve?
I am trying to validate the Golang implementation of MetricReader: open-telemetry/opentelemetry-go#3662
I discovered that the default aggregation cardinality configuration on MetricReader is not marked experimental, even though all other aspects of aggregation cardinality are. I'm assuming this is an oversight. Please correct me if I am mistaken.
Additional context.