Bump third_party/pigweed/repo from `ce0e3e2` to `dea7775` #1624

Job	Run time
Unit / Integration Tests (main)	5m 31s
Unit / Integration Tests (clang)	7m 9s
Unit / Integration Tests (mbedtls)	3m 50s
Unit / Integration Tests (rotating_device_id)	3m 11s
Unit / Integration Tests (icd)	6m 5s
	25m 46s

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