Tests

Bump third_party/openthread/repo from `d4155e4` to `0b0db37` #640

Job	Run time
REPL Tests - Linux	39m 16s
Test Suites - Darwin (no-ble-asan-clang)	24m 27s
Test Suites - Linux (no-ble-tsan-clang)	1h 21m 46s
REPL Tests - Darwin	0s
	2h 25m 29s

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