Mega Merge: Add new JSON GPU get power API, make Node-level get power JSON API nested, enable multi-platform build #1490

Job	Run time
check-code-format (ubuntu-latest, 3.7)	25s
verify-build	23s
build (11, boilerplate)	44s
build (10, boilerplate)	34s
build (9, boilerplate)	44s
build (9, shared_debug_log)	32s
build (9, shared_debug)	34s
build (9, static_debug_log)	34s
build (9, static_debug)	29s
build (9, shared_release_libjustify)	28s
	5m 27s

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