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Bump third_party/openthread/repo from `287dbfa` to `bc54d67` #65874

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Run time

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Job	Run time
Chef - ESP32 CI Examples	11m 36s
Chef - Linux CI Examples	7m 30s
Chef - NRFConnect CI Examples	9m 48s
Chef - Telink CI Examples	9m 33s
	38m 27s