metrics: support synchronous gauge #677
Merged
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Synchronous gauge is stable since 1.33.0 - open-telemetry/opentelemetry-specification#4019.
Related changes:
oteljava
waits for the1.38.0
release.The changeset:
Gauge
,GaugeMacro
SdkGauge
LastValueAggregator
record exemplarsGaugeBuilderImpl