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Bump third_party/openthread/repo from `f0b6fce` to `bd310db` #630

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Run time

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Job	Run time
Chef - ESP32 CI Examples	13m 52s
Chef - Linux CI Examples	5m 27s
Chef - NRFConnect CI Examples	11m 34s
Chef - Telink CI Examples	12m 7s
	43m 0s