SDK Metric data test

AssertAggregationsEqual asserts that two Aggregations are equal.

AssertEqual asserts that the two concrete data-types from the metricdata package are equal.

AssertHasAttributes asserts that all Datapoints or HistogramDataPoints have all passed attrs.

IgnoreExemplars disables checking if Exemplars are different.

IgnoreTimestamp disables checking if timestamps are different.

IgnoreValue disables checking if values are different.

Datatypes are the concrete data-types the metricdata package provides.

Option allows for fine grain control over how AssertEqual operates.

TestingT is an interface that implements [testing.T], but without the private method of [testing.TB], so other testing packages can rely on it as well.