Bump go.opentelemetry.io/otel/sdk from 1.16.0 to 1.43.0 in /exporter/googlemanagedprometheusexporter in the go_modules group across 1 directory

Bump go.opentelemetry.io/otel/sdk from 1.16.0 to 1.43.0 in /exporter/googlemanagedprometheusexporter in the go_modules group across 1 directory #141515