Tests

Bump third_party/openthread/repo from `d4155e4` to `74061ee` #1372

Job	Run time
REPL Tests - Linux	28m 17s
REPL Tests - Darwin	0s
Test Suites - Darwin (no-ble-asan-clang)	42m 57s
Test Suites - Linux (no-ble-tsan-clang)	1h 22m 0s
Test Suites - Darwin (no-ble-tsan-clang)	42m 12s
	3h 15m 26s

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