Improve consumer `Stream` implementations #3871

Job	Run time
check (lint)	1m 55s
check (docs)	1m 25s
check (format)	15s
check (licenses)	32s
check (msrv)	4m 31s
test (ubuntu-latest, nats-main)	14m 1s
check (examples)	2m 8s
check (spelling)	7m 18s
test (ubuntu-latest, nats-dev)	14m 15s
test (macos-latest, nats-main)	14m 4s
test (macos-latest, nats-dev)	15m 48s
test (windows-latest, nats-main)	23m 56s
test (windows-latest, nats-dev)	24m 1s
	2h 4m 9s

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