[metrics] prototype attributes instrument advisory parameter #4365
Description
Goal:
We should prototype the attributes instrument advisory parameter as described in the spec. We should ensure that this parameter is appropriately marked as experimental in both the API and SDK.
Resources:
- API spec: https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/api.md#instrument-advisory-parameter-attributes
- SDK spec: https://github.com/open-telemetry/opentelemetry-specification/blob/6360b49d20ae451b28f7ba0be168ed9a799ac9e1/specification/metrics/sdk.md?plain=1#L372-L375