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Bump third_party/mbedtls/repo from `5bc604f` to `42c82ae` #1145

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Run time

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Job	Run time
Chef - ESP32 CI Examples	14m 10s
Chef - Linux CI Examples	5m 50s
Chef - NRFConnect CI Examples	11m 57s
Chef - Telink CI Examples	11m 46s
	43m 43s