devel/py-opentelemetry-exporter-otlp-proto-grpc: Add py-opentelemetry-exporter-otlp-proto-grpc 1.27.0

OpenTelemetry Collector Protobuf over gRPC Exporter allows to export data to the
OpenTelemetry Collector using the OpenTelemetry Protocol using Protobuf over
gRPC.