Verify compliant metric SDK specification implementation: MeterProvider/Aggregation/Drop Aggregation

[MrAlias]

• Identify all the normative requirements, recommendations, and options the specification defines as comments to this issue
• Ensure the current metric SDK implementation is compliant with these normative requirements, recommendations, and options in those comments.

[MrAlias]

The Drop Aggregation informs the SDK to ignore/drop all Instrument Measurements for this Aggregation.

This Aggregation does not have any configuration parameters.

This section has not normative statements.

[MrAlias]

opentelemetry-go/sdk/metric/aggregation/aggregation.go

Line 41 in b907996

type Drop struct{} // Drop has no parameters.

Drop doesn't have any configuration parameters.

[MrAlias]

Configuring a Drop aggregation will indeed drop measurements:

opentelemetry-go/sdk/metric/pipeline.go

Lines 395 to 396 in b907996

	case aggregation.Drop:
	return nil, nil

[MrAlias]

Done