Bump third_party/pigweed/repo from `d5fcc90` to `be43983` #1231

Job	Run time
Unit / Integration Tests (main)	16m 5s
Unit / Integration Tests (clang)	17m 28s
Unit / Integration Tests (mbedtls)	14m 58s
Unit / Integration Tests (rotating_device_id)	15m 41s
Unit / Integration Tests (icd)	46m 50s
	1h 51m 2s

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