Bump github.com/GoogleCloudPlatform/opentelemetry-operations-go/exporter/collector/googlemanagedprometheus from 0.32.8 to 0.40.1 in /exporter/googlemanagedprometheusexporter

Bump github.com/GoogleCloudPlatform/opentelemetry-operations-go/exporter/collector/googlemanagedprometheus from 0.32.8 to 0.40.1 in /exporter/googlemanagedprometheusexporter #2186