Bump third_party/openthread/repo from `0b269e1` to `f0530af` #80217

Job	Run time
Build on Darwin (clang, python_lib, simulated)	1h 37m 47s
Build on Linux (fake, gcc_release, clang, simulated)	2h 16m 11s
Build on Linux (coverage)	14m 26s
Build on Linux (gcc_debug)	1h 3m 27s
Build on Linux (python_lib)	26m 17s
	5h 38m 8s

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