Tests

Bump third_party/pigweed/repo from `1f12d06` to `f788ed4` #2283

Job	Run time
REPL Tests - Linux	1h 10m 24s
Test Suites - Darwin (no-ble-asan-clang)	2m 26s
Test Suites - Darwin (no-ble-tsan-clang)	2m 35s
Test Suites - Linux (no-ble-tsan-clang)	1m 33s
REPL Tests - Darwin	0s
	1h 16m 58s

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