Bump third_party/pigweed/repo from `9504c03` to `24bec3c` #1081

Job	Run time
Unit / Integration Tests (main)	5m 56s
Unit / Integration Tests (clang)	6m 20s
Unit / Integration Tests (mbedtls)	7m 8s
Unit / Integration Tests (rotating_device_id)	7m 17s
	26m 41s

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