energy-management-app: refactor WH and EVSE into separate endpoints and fix conformance issues #110693

Job	Run time
Build on Darwin (clang, simulated)	56m 6s
Build on Linux (fake, gcc_release, clang, simulated)	56m 16s
Build on Linux (coverage)	14m 49s
Build on Linux (gcc_debug)	1h 4m 8s
Build on Linux (python_lib)	22m 21s
Build on Linux (python lighting-app)	6m 8s
	3h 39m 48s

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