stream: add fast paths for webstreams read and pipeTo #3358

Job	Run time
Build slim tarball	2m 31s
x86_64-darwin: with shared libraries	56m 36s
aarch64-darwin: with shared libraries	45m 58s
x86_64-linux: with shared libraries	48m 13s
aarch64-linux: with shared libraries	41m 56s
	3h 15m 14s

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