Improve consumer `Stream` implementations #3604

Job	Run time
check (examples)	1m 48s
check (licenses)	1m 38s
check (docs)	1m 24s
check (format)	16s
check (lint)	1m 21s
check (msrv)	1m 41s
check (spelling)	7m 55s
test (ubuntu-latest, nats-main)	12m 6s
test (ubuntu-latest, nats-dev)	10m 24s
test (macos-latest, nats-main)	12m 5s
test (macos-latest, nats-dev)	12m 18s
test (windows-latest, nats-main)	18m 43s
test (windows-latest, nats-dev)	17m 4s
	1h 38m 43s

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