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/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