tee: add zero-copy fast-path #25535

Job	Run time
Build and test uufuzz examples	1m 5s
Build the fuzzers	2m 30s
Fuzz (fuzz_test, true)	3m 26s
Fuzz (fuzz_echo, true)	3m 18s
Fuzz (fuzz_date, true)	3m 20s
Fuzz (fuzz_seq, false)	2m 14s
Fuzz (fuzz_printf, true)	3m 19s
Fuzz (fuzz_sort, false)	2m 25s
Fuzz (fuzz_expr, true)	3m 26s
Fuzz (fuzz_cut, false)	2m 22s
Fuzz (fuzz_parse_glob, true)	2m 51s
Fuzz (fuzz_parse_size, false)	2m 29s
Fuzz (fuzz_env, false)	2m 21s
Fuzz (fuzz_tr, false)	2m 36s
Fuzz (fuzz_parse_time, false)	3m 29s
Fuzz (fuzz_dirname, true)	3m 22s
Fuzz (fuzz_wc, false)	2m 17s
Fuzz (fuzz_cksum, false)	3m 27s
Fuzz (fuzz_non_utf8_paths, true)	3m 22s
Fuzz (fuzz_seq_parse_number, false)	2m 36s
Fuzz (fuzz_split, false)	2m 43s
Fuzzing Summary	7s
	59m 5s

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