Bump third_party/openthread/repo from `2aeb8b8` to `0fb1c22` #5556

Job	Run time
Build on Darwin (clang, simulated)	1h 5m 12s
Build on Linux (fake, gcc_release, clang, simulated)	54m 9s
Build on Linux (coverage)	14m 7s
Build on Linux (gcc_debug)	1h 5m 34s
Build on Linux (python_lib)	23m 56s
Build on Linux (python lighting-app)	6m 49s
	3h 49m 47s

Provide feedback