Bump third_party/openthread/repo from `0b269e1` to `f0530af` #76083

Job	Run time
Unit / Integration Tests (main)	18m 41s
Unit / Integration Tests (clang)	16m 0s
Unit / Integration Tests (mbedtls)	19m 57s
Unit / Integration Tests (rotating_device_id)	20m 30s
	1h 15m 8s

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