grpc: fix receiving empty messages when compression is enabled and maxReceiveMessageSize is maxInt64 #7753 #13145

Job	Run time
vet-proto	21s
tests (vet, 1.22)	13s
tests (extras, 1.23)	2m 51s
tests (tests, 1.23)	4m 11s
tests (tests, 1.23, -race)	5m 47s
tests (tests, 1.23, 386)	4m 52s
tests (tests, 1.23, arm64)	6m 26s
tests (tests, 1.22)	3m 50s
tests (tests, 1.23, -race, GRPC_EXPERIMENTAL_ENABLE_NEW_PICK_FIRST=true)	5m 42s
	34m 13s

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