Tests

Bump third_party/openthread/repo from `eaa6261` to `d569760` #1976

Job	Run time
Test Suites - Darwin (no-ble-asan-clang)	1h 34m 9s
REPL Tests - Linux	36m 16s
Test Suites - Linux (no-ble-tsan-clang)	1h 35m 24s
Test Suites - Darwin (no-ble-tsan-clang)	2h 3m 11s
REPL Tests - Darwin	0s
	5h 49m 0s

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