Bump third_party/ot-br-posix/repo from `bd15f71` to `23149c3` #111352

Job	Run time
Unit / Integration Tests (main)	17m 6s
Unit / Integration Tests (clang)	20m 53s
Unit / Integration Tests (mbedtls)	16m 17s
Unit / Integration Tests (rotating_device_id)	16m 48s
Unit / Integration Tests (icd)	45m 56s
	1h 57m 0s

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