refactor(manager): redis proxy to use bufio.Reader for protocol detec… #2499

Job	Run time
e2e_tests (write-buffer-size)	43m 2s
e2e_tests (concurent-back-source)	43m 8s
e2e_tests (normal)	35m 11s
e2e_tests (ipv6)	44m 26s
e2e_tests (cache-list-metadata)	38m 32s
e2e_tests (disable-seed-peer)	20m 57s
e2e_tests (split-running-tasks)	44m 50s
	4h 30m 6s

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