Bump third_party/pigweed/repo from `ce0e3e2` to `c12c17d` #99476

Job	Run time
REPL Tests - Linux	2h 1m 46s
Test Suites - Darwin (no-ble-no-shell-asan-clang)	1h 30m 30s
Test Suites - Darwin (no-ble-no-shell-tsan-clang)	2h 5m 39s
Test Suites - Linux (no-ble-no-shell-tsan-clang)	1h 47m 47s
REPL Tests - Darwin	0s
	7h 25m 42s

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