Verify compliant metric SDK specification implementation: MeterProvider/Aggregation/Last Value 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 Last Value Aggregation informs the SDK to collect data for the Gauge Metric Point.

This Aggregation does not have any configuration parameters.

This Aggregation informs the SDK to collect:

• The last Measurement.
• The timestamp of the last Measurement.

There are no normative statements in this section.

[MrAlias]

The LastValue aggregation indeed has no configuration values:

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

Lines 89 to 91 in b907996

	// LastValue is an aggregation that summarizes a set of measurements as the
	// last one made.
	type LastValue struct{} // LastValue has no parameters.

[MrAlias]

The LastValue aggregation informs the SDK to use a last-value aggregation that matches the specification:

opentelemetry-go/sdk/metric/pipeline.go

Line 398 in b907996

return internal.NewLastValue[N](), nil

[MrAlias]

done