Darwin: remove `_handleAttributeReport` convenience method #96501

Job	Run time
Build on Linux (fake, gcc_release, clang, simulated)	1h 52m 38s
Build on Linux (python lighting-app)	6m 14s
Build on Linux (gcc_debug)	1h 3m 28s
Build on Darwin (clang, python_lib, simulated)	1h 20m 15s
Build on Linux (coverage)	13m 18s
Build on Linux (python_lib)	23m 38s
	4h 59m 31s

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