benchmark: add streaming TextDecoder benchmark #2937

Job	Run time
Build slim tarball	1m 31s
aarch64-linux: with shared libraries	1h 26m 40s
aarch64-darwin: with shared libraries	2h 32m 19s
x86_64-darwin: with shared libraries	1h 1m 47s
x86_64-linux: with shared libraries	2h 6m 58s
	7h 9m 15s

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