Tests

Bump third_party/openthread/repo from `f0b6fce` to `bd310db` #894

Job	Run time
Test Suites - Darwin (no-ble-asan-clang)	1h 32m 2s
Test Suites - Linux (no-ble-tsan-clang)	1h 39m 45s
REPL Tests - Linux	1h 4m 38s
Test Suites - Darwin (no-ble-tsan-clang)	1h 50m 50s
REPL Tests - Darwin	0s
	6h 7m 15s

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