go: Define a bytePool for TRichTransport #1619

Job	Run time
compiler (ubuntu-20.04)	2m 52s
compiler (ubuntu-22.04)	2m 26s
lib-go (1.21)	1m 48s
lib-php (7.1)	1m 1s
lib-go (1.22)	1m 39s
lib-php (7.2)	1m 5s
lib-php (7.3)	1m 3s
lib-java-kotlin	4m 9s
lib-rust	3m 16s
lib-php (7.4)	1m 7s
lib-swift	1m 8s
lib-php (8)	1m 1s
lib-python (3.x)	1m 30s
lib-php (8.1)	1m 6s
lib-php (8.2)	1m 8s
lib-php (8.3)	1m 3s
cross-test (java, java,kotlin)	1m 32s
cross-test (java, go,rs)	1m 22s
cross-test (java, swift)	28s
cross-test (kotlin, java,kotlin)	23s
cross-test (kotlin, go,rs)	25s
cross-test (kotlin, swift)	47s
cross-test (go, java,kotlin)	39s
cross-test (go, go,rs)	1m 6s
cross-test (go, swift)	24s
cross-test (rs, java,kotlin)	1m 2s
cross-test (rs, go,rs)	47s
cross-test (rs, swift)	47s
cross-test (swift, java,kotlin)	26s
cross-test (swift, go,rs)	57s
cross-test (swift, swift)	31s
	38m 58s

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