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Bump third_party/pigweed/repo from `1f12d06` to `234632d` #1784

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Run time

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Job	Run time
Chef - ESP32 CI Examples	8m 37s
Chef - NRFConnect CI Examples	12m 10s
Chef - Linux CI Examples	6m 25s
Chef - Telink CI Examples	11m 45s
	38m 57s