Bump third_party/ot-br-posix/repo from `bd15f71` to `23149c3` #115485

Job	Run time
Build on Linux (fake, gcc_release, clang, simulated)	51m 50s
Build on Linux (gcc_debug)	54m 0s
Build on Linux (python_lib)	22m 12s
Build on Linux (python lighting-app)	7m 32s
Build on Darwin (clang, simulated)	43m 3s
Build on Linux (coverage)	21m 18s
	3h 19m 55s

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