rebase: bump google.golang.org/grpc from 1.66.0 to 1.66.2

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.66.0 to 1.66.2.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.66.0...v1.66.2)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/google.golang.org/grpc/experimental/stats/metricregistry.go

@@ -20,7 +20,6 @@ package stats
 
 import (
 	"maps"
-	"testing"
 
 	"google.golang.org/grpc/grpclog"
 	"google.golang.org/grpc/internal"
@@ -250,9 +249,9 @@ func RegisterInt64Gauge(descriptor MetricDescriptor) *Int64GaugeHandle {
 }
 
 // snapshotMetricsRegistryForTesting snapshots the global data of the metrics
-// registry. Registers a cleanup function on the provided testing.T that sets
-// the metrics registry to its original state. Only called in testing functions.
-func snapshotMetricsRegistryForTesting(t *testing.T) {
+// registry. Returns a cleanup function that sets the metrics registry to its
+// original state.
+func snapshotMetricsRegistryForTesting() func() {
 	oldDefaultMetrics := DefaultMetrics
 	oldRegisteredMetrics := registeredMetrics
 	oldMetricsRegistry := metricsRegistry
@@ -262,9 +261,9 @@ func snapshotMetricsRegistryForTesting(t *testing.T) {
 	maps.Copy(registeredMetrics, registeredMetrics)
 	maps.Copy(metricsRegistry, metricsRegistry)
 
-	t.Cleanup(func() {
+	return func() {
 		DefaultMetrics = oldDefaultMetrics
 		registeredMetrics = oldRegisteredMetrics
 		metricsRegistry = oldMetricsRegistry
-	})
+	}
 }

vendor/google.golang.org/grpc/internal/internal.go

@@ -217,10 +217,9 @@ var (
 	SetConnectedAddress any // func(scs *SubConnState, addr resolver.Address)
 
 	// SnapshotMetricRegistryForTesting snapshots the global data of the metric
-	// registry. Registers a cleanup function on the provided testing.T that
-	// sets the metric registry to its original state. Only called in testing
-	// functions.
-	SnapshotMetricRegistryForTesting any // func(t *testing.T)
+	// registry. Returns a cleanup function that sets the metric registry to its
+	// original state. Only called in testing functions.
+	SnapshotMetricRegistryForTesting func() func()
 
 	// SetDefaultBufferPoolForTesting updates the default buffer pool, for
 	// testing purposes.

vendor/google.golang.org/grpc/mem/buffer_slice.go

@@ -19,7 +19,6 @@
 package mem
 
 import (
-	"compress/flate"
 	"io"
 )
 
@@ -92,9 +91,11 @@ func (s BufferSlice) Materialize() []byte {
 }
 
 // MaterializeToBuffer functions like Materialize except that it writes the data
-// to a single Buffer pulled from the given BufferPool. As a special case, if the
-// input BufferSlice only actually has one Buffer, this function has nothing to
-// do and simply returns said Buffer.
+// to a single Buffer pulled from the given BufferPool.
+//
+// As a special case, if the input BufferSlice only actually has one Buffer, this
+// function simply increases the refcount before returning said Buffer. Freeing this
+// buffer won't release it until the BufferSlice is itself released.
 func (s BufferSlice) MaterializeToBuffer(pool BufferPool) Buffer {
 	if len(s) == 1 {
 		s[0].Ref()
@@ -124,7 +125,8 @@ func (s BufferSlice) Reader() Reader {
 // Remaining(), which returns the number of unread bytes remaining in the slice.
 // Buffers will be freed as they are read.
 type Reader interface {
-	flate.Reader
+	io.Reader
+	io.ByteReader
 	// Close frees the underlying BufferSlice and never returns an error. Subsequent
 	// calls to Read will return (0, io.EOF).
 	Close() error

vendor/google.golang.org/grpc/server.go

@@ -1359,6 +1359,7 @@ func (s *Server) processUnaryRPC(ctx context.Context, t transport.ServerTranspor
 		}
 		return err
 	}
+	defer d.Free()
 	if channelz.IsOn() {
 		t.IncrMsgRecv()
 	}

vendor/google.golang.org/grpc/version.go

@@ -19,4 +19,4 @@
 package grpc
 
 // Version is the current grpc version.
-const Version = "1.66.0"
+const Version = "1.66.2"