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Bump third_party/pigweed/repo from `9e4bfb9` to `45527d2` #809

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Run time

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Job	Run time
Chef - ESP32 CI Examples	12m 47s
Chef - Linux CI Examples	8m 58s
Chef - NRFConnect CI Examples	13m 0s
Chef - Telink CI Examples	11m 12s
	45m 57s