Verify Metrics configuration is spec compliant

[kaylareopelle]

There are three lines related to configuration within the spec compliance matrix:

• Configuration is managed solely by the MeterProvider
• The MeterProvider provides methods to update the configuration
• The updated configuration applies to all already returned Meters

Evaluate our current support of metrics configuration to determine whether we meet these requirements. If we do not meet these requirements, update the code as part of this issue.

For reference, here's the Metrics SDK spec for MeterProvider: Configuration