Replace go-grpc-prometheus with go-grpc-middleware/providers/prometheus

Fixes #9806

go-grpc-prometheus is deprecated. The new location it was moved to also introduced
an entirely new api, but afaict this matches what we have at the moment.

Signed-off-by: Danny Canter <danny@dcantah.dev>

vendor/github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus/server_options.go

@@ -0,0 +1,48 @@
+// Copyright (c) The go-grpc-middleware Authors.
+// Licensed under the Apache License 2.0.
+
+package prometheus
+
+import (
+	"context"
+
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+type exemplarFromCtxFn func(ctx context.Context) prometheus.Labels
+
+type serverMetricsConfig struct {
+	counterOpts counterOptions
+	// serverHandledHistogram can be nil.
+	serverHandledHistogram *prometheus.HistogramVec
+}
+
+type ServerMetricsOption func(*serverMetricsConfig)
+
+func (c *serverMetricsConfig) apply(opts []ServerMetricsOption) {
+	for _, o := range opts {
+		o(c)
+	}
+}
+
+// WithServerCounterOptions sets counter options.
+func WithServerCounterOptions(opts ...CounterOption) ServerMetricsOption {
+	return func(o *serverMetricsConfig) {
+		o.counterOpts = opts
+	}
+}
+
+// WithServerHandlingTimeHistogram turns on recording of handling time of RPCs.
+// Histogram metrics can be very expensive for Prometheus to retain and query.
+func WithServerHandlingTimeHistogram(opts ...HistogramOption) ServerMetricsOption {
+	return func(o *serverMetricsConfig) {
+		o.serverHandledHistogram = prometheus.NewHistogramVec(
+			histogramOptions(opts).apply(prometheus.HistogramOpts{
+				Name:    "grpc_server_handling_seconds",
+				Help:    "Histogram of response latency (seconds) of gRPC that had been application-level handled by the server.",
+				Buckets: prometheus.DefBuckets,
+			}),
+			[]string{"grpc_type", "grpc_service", "grpc_method"},
+		)
+	}
+}