Bump third_party/pigweed/repo from `ce0e3e2` to `dea7775` #1623

Job	Run time
REPL Tests - Linux	40m 43s
REPL Tests - Darwin	0s
Test Suites - Darwin (no-ble-no-shell-asan-clang)	1h 44m 56s
Test Suites - Linux (no-ble-no-shell-tsan-clang)	1h 57m 29s
Test Suites - Darwin (no-ble-no-shell-tsan-clang)	2h 14m 11s
	6h 37m 19s

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