perf: only decode bytes to frame for query, execute and batch messages #820

Job	Run time
units (8)	42s
windows	1m 20s
units (21)	39s
units (17)	38s
units (11)	35s
dependencies (17)	34s
lint	29s
clirr	31s
javadoc	37s
integration / integration-cassandra (11)	2m 58s
integration / integration-spanner (11)	5m 54s
	14m 57s

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