Deprecate getIsEnabled to rename isEnabled #475

Job	Run time
build-vs2022 (x64)	6m 10s
build-vs2022 (ARM64)	6m 2s
build-linux64 (linux64, 64gcc6)	1m 52s
build-vs2022 (ARM64EC)	6m 10s
build-ios-tvos (ios, macos)	2m 0s
build-emscripten (emscripten)	1m 26s
build-ios-tvos (tvos, macos)	1m 57s
build-macos (osx, xcode)	1m 6s
build-msys2 (mingw64)	4m 41s
rpi-build (armv6l, armhf, arm-linux-gnueabihf, 1)	1m 38s
build-msys2 (ucrt64)	4m 58s
rpi-build (armv7l, armhf, arm-linux-gnueabihf, 1)	1m 46s
build-msys2 (clang64)	3m 52s
build-macos (osx, makefiles)	1m 1s
rpi-build (aarch64, arm64, aarch64-linux-gnu, 1)	1m 49s
	46m 28s

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